According to the low orbit altitude and the geometric model of the satellite, we have designed a radio frequency permeable sunshade for the satellite, which can prevent light from reaching all the diffuse parts of most satellite bodies and bodies. The visor is laid flat on the chassis during launch and unfolded during satellite separation from Falcon 9. The sunscreen completely blocks the light from reaching the antenna, thus preventing the light from being reflected from the diffuse antenna. This method not only avoids the thermal effect of the darkening of the antenna surface, but also has a greater impact on the brightness reduction. As mentioned earlier, the first VisorSat prototype was launched with the eighth batch of star chains, and we will install these black mirror sunshades on all satellites after June.
A few days ago, the trendy Community Marketing Summit Forum (Guangzhou Station) was successfully held. Professor Duan Chunlin, professor and doctoral supervisor of the School of Journalism and Communication of South China University of Technology, shared a speech on the theme “how to use community marketing to build a good brand recognized by consumers”.
Requirements: 1, listen to the tasks assigned by the supervisor, as well as important guests of the banquet food delivery points for attention; 2. Make preparations before the meal; 3, inform the restaurant supervisor of the dishes recommended by the head chef and dishes that cannot be served on that day; 4, arrange the staff to prepare all kinds of side sauces before the meal; 5, according to the order and the arrangement of the supervisor, deliver the dishes to the restaurant accurately and give the name and table number to the waiter; 6, do a good job of communication between the kitchen and the restaurant; 7, check the quality, temperature and quantity of the dishes in the process of passing the dishes 8. After the meal, turn off the power supply of the water heater and towel box, send the rest of the meal back to the kitchen, take back the tray, finish the finishing work, and hand over the work with the next shift.
4. The thermal insulation layer and anti-corrosion coating should avoid direct contact with flame. For on-site installation, please follow the following procedures: pipe trench excavation-base treatment (drainage, sand cushion)-lower pipe-steel pipe welding-inspection (water pressure)-installation (pressure test)-foaming-sealing foam cell. Elbow and joint installation can send personnel to the project site to carry out the heat preservation work of the joint, including the installation of the outer casing of the joint, the connection and sealing of the outer casing of the joint with the supervisor, and the foaming work of the on-site joint, but it does not include the welding of the steel pipe of the joint. Construction attention Editing
High temperature thermal insulation material can effectively prevent the occurrence of thermal bridge, and there is no need to add reinforced concrete structure in construction. The relative fixation of the inner and outer steel flanges of the directly buried foam insulation spiral pipe can bear enough axial thrust according to the design requirements, which can fully ensure the safe operation of the whole pipeline. ?? It includes the installation of the joint outer casing, the connection and sealing of the joint outer casing with the supervisor and the foaming work of the on-site joint, but does not include the welding of the steel pipe of the joint part. (1) method? Sleeve joint, in this way, the joint casing is made of the same material as the prefabricated thermal insulation pipe casing, and the polyethylene casing is connected and sealed with a heat shrinkable belt between the polyethylene joint casing and the main pipe to ensure the watertightness of the joint. Then the joint foaming is carried out on the foaming hole on the joint casing, and after the foaming is completed, the foaming hole is sealed by patch or hot melt welding.
Matters needing attention in the construction of prefabricated directly buried insulation pipe mending method: 1. The immersion of groundwater and Rain Water should be avoided during construction. If the end is inadvertently soaked, drying treatment should be done before connecting the jacket. 2. The pipe should be stored in a flat site, neatly placed, and the height of the pipe should be less than m. 3. Pipe hoisting is light and light, collision and throwing are prohibited, and straight hoisting of steel wire rope is prohibited. 4. The thermal insulation layer and anti-corrosion coating should avoid direct contact with flame. For on-site installation, please follow the following procedures: pipe trench excavation-base treatment (drainage, sand cushion)-lower pipe-steel pipe welding-inspection (water pressure)-installation (pressure test)-foaming-sealing foam cell. Joint installation, the heat preservation work of the joint is carried out on the project site, including the installation of the joint outer casing, the connection and sealing of the joint outer casing with the supervisor and the foaming work of the on-site joint, but does not include the welding of the joint part of the steel pipe.
Thermal insulation materials are used for all kinds of cold water, cold air, cold oil pipeline round, special-shaped and any shape of pipe heat preservation. Prevent condensation: polyethylene foam pipe material is a closed-cell structure, which is adiabatic by the gas insulation in the closed cell rather than polyethylene material. It has excellent resistance to water vapor penetration. Therefore, it is necessary to introduce supervisors for pipeline construction projects and anti-corrosion overhaul projects, and supervision, like the roles of design, construction and overhaul, should have the ability to grasp professional anti-corrosion standards. All aspects of pipeline engineering should pay enough attention to anticorrosion, a seemingly unimportant covert project. Features of centrifugal glass wool products: ◆ inner steel pipe adopts silicone high temperature resistant paint (≥ 400℃) anticorrosive coating to effectively prevent working steel pipe from corrosion and prolong service life.
In the middle of summer, car thermal insulation and sunscreen has also become the most concerned thing for the majority of car owners, and many car owners spend money to do “midsummer sunscreen” for their cars. Recently, the reporter visited the market and found that all kinds of automobile sunscreen products such as sunscreen, front window visor, sunshade curtain, car umbrella and so on emerge one after another, and the film business of automobile film shops has also ushered in the peak season, and the automobile sunscreen economy is relatively hot. The reporter searched “car sunscreen products” on Taobao and found that the top seller was car sunshade umbrellas, with monthly sales reaching 100000 +.