Greenhouse: With polymer - polyvinyl chloride, polyethylene production, plastic films are widely used in agriculture. Japan and the United States and Europe to be successful winter-type greenhouse in the early 1950s, the cost of application film covering hotbed, and subsequently covered with shed and greenhouse can also get good results. Introduced in the autumn of 1955 winter-type PVC agricultural greenhouse film factory, the first in Beijing to cover the vegetable shed, get precocious yield results. Features greenhouses: temperature conditions. The arrival of spring season shed and exposed to gradually increasing the temperature difference between winter-type greenhouse, warming up to 6-15 ℃. In the winter sunny, nighttime minimum temperature than the dew high 1-3 ℃, cloudy days and exposed to the same few families. Therefore, the main greenhouse production season for spring, summer and autumn. Through the insulation and ventilation and cooling can Pengwen maintained at optimum growth temperature of 15-30 ℃. Winter-type greenhouse prices, Communications Technology, Shijiazhuang, winter-type greenhouses provided by Anyang City Communications Technology Limited. Anyang City Communications Technology Co., Ltd. (www.aytlkj.com) (http://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. You can also access (www.aytlkj.com/supply_details_42748070.html), for more information about the company.