"Multiple use of a film" refers to repeated use of a piece of plastic film. "Multi-use of a film" can increase the utilization rate of the film, reduce the cost of mulching and increase the economic efficiency. There are several ways to use a film: Multiple coverage or two-layer covering with a plastic mulch covering the small shed, early colonization of melons and other vegetables. After the temperature rises, it covers the ground in situ, or covers it with a small shed of plastic film. A film can cover more than two times by covering a film multiple times. If you cover the overwintering vegetables first, and then cover the early spring vegetables or potatoes, you can also use them to cover the summer solanes, melons, and beans. A film of two pods can be grown in the mulching film of eggplant, pepper and other thermophilic vegetables interplanting early cabbage, lettuce, indigo, April white and other hi-cold vegetables; spring dwarf beans or greenhouse plastic film cucumber harvest after pulling , Multiple crop radish, summer cabbage, autumn kidney beans and autumn cucumber. After the harvest of short-growing early cabbage, lettuce and other vegetables, the residual roots, leaves, debris and debris in the field are cleared, but the mulching film is not removed, the land is not ploughed, and the original small sorghum is sown or planted. Vegetables, such as live or transplanted cucumbers, kidney beans, etc. Arch greenhouse is a kind of economical greenhouse, which is welcomed by the users with graceful curve form and low cost. It has beautiful appearance, fluent visual, reasonable structure and good performance for keep temperature. It is economical greenhouse because of its relatively low manufacturing cost. It can be applied in most areas of China. Double membrane greenhouse is used more in north of China, while single film greenhouse is used more in southern region. It can get maximum sunlight when visible light is within the scope of 0.4 to 0.7 microns and form a thick envelope, which can effectively prevent heat loss and prevent the invasion of cold air. Adopting a double membrane can greatly improve heat preservation performance of the greenhouse and save operating cost. The top cover material is polyethylene lifelong anti-fog and anti-dipping film po-covering. The outer of it has the function of UV protection and the inner has the function of preventing from the sets of dew. According to the needs of customers, the sides of the greenhouse can be covered with polyethylene lifelong anti-fog and anti-dripping po-covering or polycarbonate hollow plate. Multi Span Plastic Film Greenhouse Pc Board Greenhouse,Pc Sheet Covering Greenhouse,Greenhouse Pc Board JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , http://www.spgreenhouse.com