　 1. The refrigeration system of a refrigerated truck is used to maintain the temperature of the goods in the cargo compartment instead of cooling the hot goods.
2. When refrigerated trucks load cargo, their stacking height should not exceed the limited load line, and there should be gaps between the cargoes to facilitate the circulation of cold air.
3. The operation and maintenance of the refrigeration unit shall be performed strictly in accordance with the instructions of the refrigeration unit.
4, for the relatively large refrigerator car, the vehicle center of gravity has been increased, it should pay attention to stability when driving, turning speed should be slowed down.
5, before loading, the goods and the car body must be precooled to the appropriate transport temperature, and then loaded. Close the refrigeration unit when loading or unloading. Minimize the number of open doors during transportation to reduce cold loss.
6, in order to prevent cross-infection, odor, each vehicle should be washed after use, eliminate odor, and disinfection to ensure the quality of the product transport. It should be noted that when cleaning, it is best to stop on the slope so that the sewage flows out.
7, should always keep the vehicle clean, no defects, every time before the car to check the chassis and chassis connection. Guarantee the safety of transportation.
8, refrigerated trucks should be stored in the rain, sun, moisture-proof fire facilities with the warehouse, and regular maintenance.
9. When transporting vehicles, use self-drive or drag-and-drop methods to disembark and disembark the boat. When lifting, special spreaders should be used to avoid damage to the vehicle.
10. It is strictly forbidden to strike the car body with sharp objects to prevent damage to the car body skin. After accidentally breaking, the small hole can be repaired with silicone rubber (glass glue). Contact with the manufacturer for repair should be timely.
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Metal roofing sheet is a kind of thin steel sheet, Galvanized Steel Sheet or Color Steel Sheet formed by cold pressing or cold rolling. Profile steel Roof Sheet is a good building material and component. It is mainly used for building envelope, floor and other structures. According to the requirements of different functions, corrugated steel sheet can be pressed into waveform, hyperbolic waveform, rib shape, V shape, stiffening type, etc. The type order of roof sheet is generally expressed by wave height, wave distance and effective coverage width. Profile roof sheet is light in weight, not thick in thickness, generally 0.15 to 1.2mm in thickness.With different thickness, width and length, there will be differences in the number of meters per ton.The corrugated shape of steel roof tile is straight and firm, with bright colors, beautiful appearance, strong durability, good anti-seismic and anti deformation performance, simple in processing and convenient in construction. Roofing steel sheet is widely used in industrial and civil buildings, as well as roof, ceiling and other frameworks and structures on the decorative surface.
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