Shed the history and function: 1957 by Beijing to promote the use of Tianjin, Shenyang and Northeast China, Taiyuan and other places, welcomed everywhere. 1958 our country has been able to produce their own agricultural polyethylene film construction of new vegetable greenhouses, vegetable production and thus shed covered already very extensive. The mid-1960s has been shaped arched shed new type of vegetable greenhouses price, about one meter high, 1.5 to 2.0 meters wide, it is known as a small shed. Because of the little shed-type cold areas not suitable for use in the Northeast. Features greenhouses: humidity conditions. Airtight film is strong, so after covering shed soil moisture evaporation and crop transpiration caused by the greenhouse air temperature, if not for ventilation of new vegetable greenhouses offer, shed the relative humidity is high. When Pengwen rises, the relative humidity decreases, Pengwen reduce the relative humidity increases. Sunny, wind weather, relatively low temperature, overcast, rain (fog) days of relative temperature increased. The new vegetable greenhouses construction price, Communications Technology, Beijing Novel vegetable greenhouses provided by Anyang City Communications Technology Limited. Anyang City Communications Technology Co., Ltd. (www.aytlkj.com) is Anyang, a leader in agricultural supplies, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Communications technology leadership in the staff warmly welcome all inquiries negotiations to create a better future for Communications Technology.