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  • Good print quality, a detail is important

    A detail often determines the life and death of a company. The current market competition is intensifying. The printing factory needs to be different. If it is a boutique, it must be improved and grasp the quality of printing. For example, in terms of humidity, have you noticed? Temperature and humidity will affect the paper: Paper is made up of plant fibers, which are porous and hydrophilic and very sensitive to water. The ambient temperature and humidity will change slightly, and the paper moisture content will change. The influence of relative humidity of air on the water content of paper generally increases the relative humidity and increases the water content of the paper. Conversely, the relative humidity decreases and the water content of the paper decreases. The effect of temperature changes on paper moisture content is different. Generally, the temperature rises and the water content of the paper decreases. The water content of the paper is directly related to the printing performance. For example, changes in the moisture content of the paper can cause the paper to stretch (including local deformation). The dimensional stability of the paper has a lot to do with the suitability of the print and the suitability of the registration. Into it is a multi-color overprint product, the paper size changes, will cause product overprinting is not allowed, become a defective, waste. Therefore, the dimensional change of the paper due to the influence of temperature and humidity is one of the important problems in the printing workshop. Changes in the paper's water content can also cause changes in other properties of the paper. If the water content increases, the tensile strength and surface strength of the paper decrease; if the water content is too low, the paper becomes brittle and hard, and the static charge is easily generated during printing. Effect of temperature and humidity on ink: The temperature and humidity affect the ink is the drying speed. Various printing inks are affected by temperature and humidity. Generally, the higher the temperature, the faster the drying; the lower the temperature, the slower the drying. In particular, the ink in the lithographic process causes emulsification during the printing process due to the presence of dampening solution, so the relative humidity affects the evaporation of moisture in the ink. Therefore, the temperature and humidity have a direct influence on the drying speed of the ink. If the temperature is too low, the relative humidity is too large, which will reduce the drying speed of the ink and the printing cycle. The temperature and humidity of the environment also affect the viscosity of the ink. As the ambient temperature increases, the viscosity of the ink decreases; the ambient temperature decreases and the viscosity of the ink increases. If the temperature is too low and the viscosity of the ink is too high, printing failure may occur, such as partial peeling of the paper surface, sticking to a blanket or a printing plate. Therefore, controlling the temperature and relative humidity of the printing shop can control the drying speed of the ink and cause printing failure. If the temperature and humidity are out of control, the substrate will generate static electricity: the temperature and humidity of the printing workshop is too low, and the relative humidity is too low, which will cause the substrate to be electrostatically charged during the printing process. The consequences of static electricity can cause difficulties in paper feeding and delivery, and on the other hand, printing failures, and even fires due to discharge. The Fangtian A series uses a special industrial humidifier circuit board, a high-reliability toroidal transformer, and a full range of water filters. It is simple and convenient, and employees do not need to learn anything. We look forward to the Fangtian A series industrial humidifier as a good helper for your production and life. [View Details]
  • Application of Funtun Z series small humidification sprayer in vegetable preservation

      The effect on the preservation of supermarket vegetables: 1. Extend the life expectancy of fresh vegetables and fruits, maintain the fresh color of fruits and vegetables, and improve the visual effect of fruits and vegetables; 2. Preserving the original taste of fresh fruits and vegetables, preventing the fruits and vegetables from withering and yellowing, and prolonging the freshness of vegetables; 3. Avoid the loss of moisture and weight of fresh fruits and vegetables, and increase the shelf life of fruits and vegetables on the shelves; 4. Attract customers to buy, increase the popularity of fresh supermarkets, and increase the sales profits of supermarkets;   Some friends have some questions about the spray effect of the fresh-keeping machine. I want to see what effect the machine is. Since most of the photos are after installation, they can't really reflect the true strength of the spray. For the needs of this group of friends, we took a video clip of the spray effect in the production workshop. After the machine is up, your boot test will also be the result. Of course, if you take a long pipe, or if the pipe bends too many times, the amount of fog will drop, which is unavoidable. However, you can rest assured that our machines are truly industrial models. The air volume and the amount of fog have standard parameters, which can be tested for long-term use. The following video is the spray effect of FT-Z6, please check (preferably watch under WIFI) Please copy this link to open: http://i.youku.com/huandq, find FT-Z series 6kg automatic water spray Volume demonstration   Fangtian's all-round FT-Z series industrial humidifier adopts a flat chassis design, which is suitable for being placed under the workbench. Different models have different dimensions depending on the amount of spray. For details, please refer to the technical parameters. The spray volume starts from 3kg/h. Up to 80kg/h, it is a standard industrial grade ultrasonic humidifier. [View Details]
  • Fangtian humidification website revised

    In order to make it easier for users to distinguish the characteristics of different product series of Fangtian, our website revised the product classification method, so that users can see the characteristics of different products at a glance.   Some problems with website visits may occur in the near future, which is purely normal. [View Details]
  • Reasonable control of temperature and humidity when storing paper products

    Paper is a highly hydrophilic material. Changes in the moisture content of the paper can cause the paper to become deformed and become brittle, causing inaccurate overprinting of the printed matter and breakage during the forming process of the paper. Changes in ambient temperature and humidity are the main factors affecting the moisture content of the paper. The paper not only absorbs moisture during contact with the paper, but also absorbs moisture from the moist air and drains it into the dry air. When the paper absorbs water, it expands, the linear size and area in all directions increase, and the mechanical strength decreases. The paper shrinks after dehydration, and the linear size and area in all directions shrinks, becoming stiff and brittle. Therefore, to control the change in paper properties, it is necessary to control the moisture content of the paper and control the temperature and humidity of the environment in which the paper is placed.   Throughout the printing process, paper is taken from the warehouse, cut, printed, and post-pressed, and transferred from one workshop to another. At this time, it is necessary to consider the possible changes in temperature and humidity due to the change of space. This results in a change in paper properties. (1) Warehouse In storage, pay attention to the conditions of paper storage, and control the temperature and humidity of the warehouse environment. If the paper is under high humidity, it will absorb the surrounding moisture and curl and deform, and the ruffle will appear. If the paper is stored in a very dry environment, it will cause the water in the paper to be dispersed and the paper will become brittle and brittle. , there is a tight edge phenomenon. Therefore, the paper should be stored close to the environment. (2) Printing workshop Due to the difference in temperature and humidity due to changes in the surrounding environment, the paper should be subjected to humidity conditioning before being printed, especially for sheetfed paper. When the sheet of paper is unpacked, the water content cannot be the same as the temperature and humidity of the printing workshop. It is necessary to carry out the humidity control treatment to make the water content of the paper uniform and consistent with the temperature and humidity of the printing workshop. There are usually three methods for adjusting the offset sheet of paper: 1 hanging in the printing workshop or in the drying room close to the temperature and humidity of the printing workshop; 2 drying paper at 6%-8% higher than the relative humidity of the printing workshop. The humidity is treated separately; 3 the paper is first humidified in a damp place, and then the water is balanced between the printing workshop or the air-drying paper which is close to the temperature and humidity of the printing workshop to make the water content of the paper uniform. Comparing these three methods, the latter two methods work well, but require some equipment and venue. Due to the limited conditions, most of the printing factories in China currently use the first method, which is usually called the natural humidity control method. If the paper is stored in an environment without temperature and humidity control, at least 24 hours before the printing, the paper should be sent to the printing workshop for humidity control, so that the moisture contained in the paper is compatible with the temperature and humidity of the printing workshop. In order to ensure the accuracy of overprinting and improve the quality of printed products. In addition, the web and the sheet of paper have different humidity control measures. The web is wrapped in paper rolls (such as kraft paper), and its outer packaging can protect the moisture content of the web inside from the external environment humidity. Only open the outer packaging before the machine is installed. (3) Postpress processing workshop Temperature and humidity control is the control of the entire process of printing. Some printers only pay attention to the temperature and humidity control of the printing workshop, but ignore the temperature and humidity control of the finishing shop. The printing workshop is equipped with corresponding air conditioners, humidifiers and other devices to ensure the stability of the printing workshop environment. The post-press processing workshop should also adopt the same method to ensure the stability of the processing environment, in order to make the paper products processing "all the way smoothly." Otherwise, when the printed matter enters the dry and cold post-pressing workshop from the printing workshop with temperature and humidity control, the front printed paper, cardboard, and cardboard will be broken, exposed, etc. when the carton forming process is performed. The problem is a huge waste of production. [View Details]
  • Surgical room temperature humidity and pressure control

    According to the requirements of the "Hospital Cleansing Department Building Technical Specification GB50333-2002", the temperature and humidity of the operating room must be controlled within a certain range. Therefore, the operating room temperature in the design is set at t=22-25°C; the relative humidity is 35-60%. According to different sizes of rooms, configure the corresponding dehumidifying air conditioner and humidifier.   According to the principle of the three-zone and two-channel, the pressure of the surgical department is arranged from large to small as a special clean operating room, a general clean operating room, a clean corridor, a vertical passage and a dirt gallery. The cleanliness level of the clean corridor is lower or equal to that of the general clean operating room, so there is a pressure difference between the two. The dirt gallery is the lowest level in the entire surgical department, so the pressure difference between the operating room and the dirt gallery is greater than 5Pa. This can ensure the reasonable flow of airflow between different areas and prevent the invasion of external pollution.   For the operating room, in order to maintain the cleanliness of the room, from the pollution of the adjacent room, it is necessary to maintain a higher air pressure relative to the adjacent room, that is, maintain a positive static pressure difference with respect to the adjacent room. The existence of the static pressure difference prevents the outdoor air from entering the clean room from the gap when the door and the window are closed. In addition, when the door is opened, there should be enough airflow to flow outward to minimize the polluted air that the person brings in instantaneously. According to the provisions of the "Air Clean Technical Measures", to prevent gap penetration, generally two adjacent rooms should maintain a pressure difference of 5 Pa, while the outdoor should maintain a pressure difference of 15 Pa. For the 100-level operating room, according to the "Cleanhouse Construction Acceptance Specification", the positive pressure must meet the requirement that the cleanliness is not low at 0.6 meters from the door when the door is opened, that is, the gas brought in by the person when the door is opened instantaneously is not The deep entry port is 0.6 meters away. (See figure) The air conditioning design manual states that the working area of a general clean room is 0.8-1.5 meters above the ground. The flow rate of the vertical laminar flow operating room is 0.25-0.3m/s, the technical specification of the hospital clean operation department GB50333-2002 and the door height is about 2.0 meters, then Vo/V=(2.0-0.8)/0.6, V=0.15 m/s, that is, when the external V is not more than 0.15m/s, it will not affect the indoor laminar flow. According to the "Principles of Air Clean Technology", it is proposed that the intake air flow rate is 0.2m/s when entering the door, so it is clean. The chamber air flow rate is: V1 = 0.2 - V = 0.2 - 0.15 = 0.05 m / s. Assuming that the operating room door is 1.5 meters wide, the area of the door is: A = 2 * 1.5 = 3.0 square meters, so the air volume Q = A * V = 3.0 * 0.05 = 0.15 cubic meters / second, that is, 540 cubic meters / hour. Therefore, when the positive pressure air volume in the operating room is more than 540 cubic meters / hour, the laminar flow requirement can be satisfied.   When the system is in normal operation, the exhaust system can be installed in the system to remove excess gas, so that the positive pressure value of the operating room is always a reasonable value.   In addition, attention should be paid to setting up one or several clean operating rooms that can turn the positive pressure in the operating room into a negative pressure to prevent infectious diseases from transmitting the bacteria to others through the air conditioning system. [View Details]
  • Effect of Temperature and Humidity on Fiber Textile Properties

    1. Temperature influence Cotton wax is a mixture of alcohols, fats and gums. When the temperature is lower than 18.3 °C, the cotton wax is in a hardened state, the lubricating effect is lowered, the drafting resistance is increased, and the spinning process is affected. After the temperature is higher than 18.3 ° C, the cotton wax begins to soften, the fiber is soft and soft, and the spinnability is enhanced. When the temperature exceeds 27 ° C, the cotton wax begins to melt and become sticky, which is also disadvantageous for spinning. Generally speaking, the temperature is between 19 and -27 ° C, and the cotton wax is softened and not sticky, and is easily separated into single fibers, which is advantageous for removing impurities and drafting, and is easy to be spun into high-quality sliver cotton yarn. The properties of synthetic fibers are different from those of raw cotton, which is hard when the temperature is low. When the fiber passes through the skin roller and the apron, it is easy to slip and increase the breakage. When the temperature is high, the antistatic agent is easily volatilized, so that the electrostatic effect is strengthened and the spinning is difficult. Therefore, the temperature control requirements of synthetic fibers are stricter than those of pure cotton.   2. The effect of relative humidity: (1) Relative humidity and friction coefficient: Friction occurs in the relative movement. Friction is proportional to the coefficient of friction, and the coefficient of friction is related to factors such as material type and relative humidity of the air. As shown in Fig. 1, when the relative humidity is too large, the friction coefficient of the cotton yarn and the steel member is increased, so that the wear and fly-off phenomenon of the wire ring is increased, and the drafting and breaking are affected. (2) Relative humidity and impurity removal: When the moisture regain of raw cotton or cotton lap is too high, the cotton lump is not easy to open and difficult to remove; when the moisture regain is too low, the cotton fiber is easily broken and the strength is decreased; the short velvet is increased. Only when the relative humidity control is appropriate can the moisture regain of the semi-products be normal and a better impurity removal effect can be obtained. (3) Influence of relative humidity on the performance of the top roller The proper holding force between the top roller and the fiber during the spinning process. When the relative humidity is too high, the friction between the fiber and the roller and the skin is increased, thereby causing a phenomenon of winding the roller and the roller, which affects the production. Therefore, when changing the roller in actual operation, it should be stored in the workshop for a certain period of time, so that it can adapt to the temperature and humidity of the workshop, prevent the surface from condensing, and reduce the phenomenon of “three windings”. (4) Humidity and fiber strength relationship After the relative humidity is increased, the long-chain molecules of cotton can be arranged neatly and strongly. However, when the relative humidity is increased, the sliding movement of the long-chain molecules is intensified, so that the fiber strength is affected. Therefore, the strength of cotton fiber does not increase linearly with the relative humidity; the viscose fiber is different, the lower the relative humidity, the higher the strength. (5) Humidity and static electricity: During the textile process, the fiber and the machine parts, the fiber and the fiber or the mechanical parts and the machine parts rub each other to generate static electricity, and the static electricity causes the fiber and the surface of the machine to have different electric charges, when the yarn and the top roller When carrying different charges, according to the principle of mutual attraction of opposite charges, the fibers will be adsorbed on the surface of the machine to form a "three-wound", which brings great difficulties to the textile process. Increasing the relative humidity of the workshop can enhance the electrical conductivity of the fibers and parts, and the static electricity is easily neutralized by the machine. Therefore, improving the relative humidity of the workshop is one of the main methods to solve the problem of static interference in the workshop. Experience has shown that the relative humidity of the workshop is not less than 45%, and the static interference can be better eliminated when the relative humidity can reach 65%. [View Details]
  • How to reduce static electricity in the production workshop by industrial humidifier

    Want to create a better production environment in the workshop, naturally is inseparable from the requirements of air humidity. In production, the production of some products needs to be carried out normally when the air humidity reaches a certain level. For many factories, there is a large amount of mechanical equipment in the workshop. The subjective environment causes a large amount of hot air and air drying during the operation. Static electricity causes the machine to stop, which reduces the production efficiency and can cause the computer to malfunction. . Therefore, the research on anti-static safety technical measures has attracted more and more people's attention, and is eager to completely eliminate the generation of static electricity in production.   When the humidity is maintained at about 60% RH, the electrical resistivity of the charged body is lowered, and an electrostatic charge is released to suppress the generation of static electricity. The more dry the air, the more likely it is to have static electricity in order to deal with this problem. Hangzhou Riye Company has made unremitting efforts, and now there is a solution, that is, ultrasonic spray humidifier, which can evenly increase the humidity of the air, so that all electrostatic flying dust is difficult to exist. In summary, workshop spray purification is the ideal air humidification option for many factories, and the market prospects are becoming more and more broad.   Some production plants need to control the humidity of the air. With the development of technology, many industrial production plants use spray humidifier equipment. Air humidification adjustment means that the air after a certain treatment is sent into the room in a certain way, and the humidity of the indoor air is made within a certain range. Air spray conditioning not only creates a good working and living environment, but also meets the special needs of certain scientific experiments and industrial production processes.   At present, air spray humidification technology has been widely used in various fields of society. With the rapid development of humidifier equipment in the industry, the proportion of air humidification systems in domestic industrial production environments is increasing, and the requirements for production environment comfort and energy conservation are also increasing. Every year, we emphasize anti-static and anti-static! Never take anti-static measures until the hazard occurs. Because many industrial processing sites are subject to static electricity, humidifier equipment is used in most processing locations.   Compared with household humidifiers, industrial ultrasonic humidifiers will have a greater role in regulating air humidity in the production field. Industrial ultrasonic humidifiers can be widely used in the textile industry, paper industry, computer room, electronics factory workshop, Spraying industry, plastics industry, printing industry, food industry, various laboratories, tobacco storage processing and many other industries. Most of these industries suffer from static electricity during the dry season.   Eliminating static electricity is a difficult thing to achieve, but it has found a good product and method: by using an industrial humidifier for reasonable humidification, the humidity can always be maintained between 40-60% RH, eliminating static electricity is not a good result. problem. The industrial plant is the production base of the product. The environment inside the plant directly affects the quality of the product. With the improvement of high-tech production technology, the factory environment is too dry and not conducive to production. The modern industrial plant is no longer a simple factory. In addition to considering the practicality of the function, the environmental temperature and humidity control of the industrial plant in the new era is also very important. The suitable production environment can create industrial products that are compatible with the times.   At present, industrial humidifiers play an increasingly important role in industrial production, and are increasingly favored by manufacturers. In various places, equipment such as humidifiers is used to increase the humidity of the environment. It is essential to use an ultrasonic spray humidifier because the factory controls the humidity during production and storage. [View Details]
  • How the textile production process effectively removes the effects of static electricity

    Every winter, the appearance of static electricity will become more frequent. People are very confused about this. Why does static electricity appear in winter? This is why the winter is very dry, the electrical conductivity of the article will be reduced, so it is more prone to static electricity. Now that we know this reason, it is very simple to remove static electricity. We only need to use a humidifier to increase the humidity. And its use in the textile industry can also reduce the phenomenon of flying flowers and static electricity, 1. Relative humidity and the relationship between the wire and the friction between the mechanical surface and the fiber and the friction between the fibers, inevitably cause the fiber to be charged. When the fiber and the body have different charges, it will hinder the stretching and combing of the fiber. The interweaving and winding process proceeded smoothly. When there are different charges between the fibers, the fibers will not coincide with each other, and the hairiness will be thick, causing the light yarn to become hairy, so that the weaving breaks and the flower picking will increase, the fabric surface will be rough and form a scattered shape, and the relative humidity of the air will be improved. The specific resistance of the fiber can be lowered to increase the rate at which the charge is dissipated, thereby eliminating static electricity. 2, the relationship between relative humidity and moisture regain, the relative humidity of the air is different, the moisture regain rate of the fiber is also different. As the relative humidity of the air increases, the moisture regain of the fiber also increases, but decreases. 3, the relationship between relative humidity and strength Relative humidity has a strong influence on the fiber, can improve and improve the degree of long-chain molecules and increase the strength, in the case of cotton fiber, when the relative humidity is 60-70%, he The strength is about 50% higher than the dry state. 3. Relationship between relative humidity and elongation The fibers after moisture absorption are prone to relative displacement under the action of external force due to the increase in the distance between molecules, so the elongation of the fibers increases as the relative humidity increases. Among them, wool, silk and viscose fiber are more easily elongated than natural fibers such as cotton and hemp. As for synthetic fiber (such as polyester), the relative humidity has little effect on the elongation due to poor hygroscopicity. 4. Relationship between relative humidity and softness When the relative humidity increases, the distance between the molecules after the fiber absorbs moisture increases, so the hardness and brittleness of the fiber decrease, and the softness of the fiber is greatly improved. 2, the relationship between relative humidity and moisture regain, the relative humidity of the air is different, the moisture regain rate of the fiber is also different. As the relative humidity of the air increases, the moisture regain of the fiber also increases, but decreases. 3, the relationship between relative humidity and strength Relative humidity has a strong influence on the fiber, can improve and improve the degree of long-chain molecules and increase the strength, in the case of cotton fiber, when the relative humidity is 60-70%, he The strength is about 50% higher than the dry state. 3. Relationship between relative humidity and elongation The fibers after moisture absorption are prone to relative displacement under the action of external force due to the increase in the distance between molecules, so the elongation of the fibers increases as the relative humidity increases. Among them, wool, silk and viscose fiber are more easily elongated than natural fibers such as cotton and hemp. As for synthetic fiber (such as polyester), the relative humidity has little effect on the elongation due to poor hygroscopicity. 4. Relationship between relative humidity and softness When the relative humidity increases, the distance between the molecules after the fiber absorbs moisture increases, so the hardness and brittleness of the fiber decrease, and the softness of the fiber is greatly improved. [View Details]
  • What should I do if the humidity in the food proofing room is not enough?

    The lab's proofing room is broken, and there is a spare proofing room, but the spare humidity adjustment is only 60, which can't reach the bread proofing humidity. Will this have a great impact on the final product? I don't know if there is any additional method to improve the humidity of the proofing room. Thank you for passing the passing colleagues.   Answer The humidifier can be used to solve the problem of the above-mentioned dear friend. For example, the humidifier can be selected according to the size of the room and the required humidity level. [View Details]
  • Temperature and Humidity and Equipment Selection for Fermentation of Black Tea Tea

    Fermentation is a key process for the formation of red tea color, aroma and taste characteristics. Generally, the loquat leaves are placed in a fermentation box or a fermentation cart, and are fermented in a fermentation chamber. The fermentation is to master the appropriate temperature, humidity and oxygen amount required to satisfy the polyphenolase oxidative polymerization of the tea.      (1) Temperature:      Generally, the room temperature is controlled at about 20 to 25 ° C, and the leaf temperature of the fermentation is preferably maintained at about 30 ° C. If the leaf temperature exceeds 40 °C, it is necessary to carry out the mixing and cooling, so as to avoid the excessive change of fermentation, so that the tea is low in taste and dark in color. In particular, in the hot season, cooling measures should be taken, and the leaves should be thin to facilitate heat dissipation; on the contrary, when the temperature is low, the leaves should be thick, and if necessary, some insulation measures should be taken.      (2) Humidity:      Keeping the air humidity above 90 is beneficial to increase the activity of polyphenol oxidase; it is beneficial to the formation and accumulation of theaflavins; on the contrary, the air humidity during fermentation is too low, which is not conducive to the enzymatic oxidation of tea polyphenols, making non-enzymatic The oxidation is intensified, causing the soup color and the bottom of the leaves to darken and the taste is weak.      (3) Thickening of the leaf:      Usually 8 to 12 cm. Young leaves and small leaves should be thinly spread; old leaves and large leaves should be thick. When the temperature is low, it should be thick; when the temperature is high, it should be thin. However, regardless of the thick or thin stalls, the leaves should be well ventilated during fermentation. During the fermentation process, it should be mixed once to facilitate heat dissipation.      (4) Fermentation time:      The fermentation time of Gongfu black tea is generally 2~3h, and the fermentation time of red crushed tea is generally 30~90min. The fermented leaf grass gas disappears, and a fresh, fresh flower and fruit fragrance appears, and the leaf color changes red, which is moderate fermentation. Generally, spring tea is yellowish red and summer tea is reddish yellow. [View Details]
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