Greenhouse: With polymer - PVC, polyethylene film produced double steel sheds, plastic films are widely used in agriculture. Japan and European countries in the early 1950s to get a film covering a hotbed of successful application of the double membrane steel shed construction company, and subsequently covering the shed and greenhouse can also get good results. In the autumn of 1955, the introduction of PVC agricultural film, the first in Beijing to cover the vegetable shed, get precocious yield results. Shed the history and function: 1966 Changchun first to a small shed converted into a 2-meter square shed. But poor resistance to snow collapsed the price of steel shed double membrane, after several alterations trial steel shed double membrane manufacturers, and finally the creation of about two meters high and 15 meters wide, covering an area of ??1 acre arched greenhouses . 1970 promotion to the rest of the north. 1975, 1976 and 1978 held three "national plastic greenhouse vegetable production research collaboration will be" meeting on the development of greenhouse production played a role. Steel shed double membrane manufacturers _ _ Zhengzhou double membrane steel shed Communications Technology provided by Anyang City Communications Technology Co., Anyang City Communications Technology Co., Ltd. (www.aytlkj.com) strong, credible, in Anyang, Henan agricultural supplies industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement of innovative ideas and Communications Technology will lead you into the brilliant work together for a better future!