Qingdao Shuangjunli Machinery Co., Ltd specializes in design, manufacture and installation of temperature control equipments, like exhaust fans, cooling pads, and other related products which can be used in poultry houses, greenhouses, factory workshops, supermarkets, dinning houses and other large size places. For years company has committed itself to energy conservation and environment protection and made a good example in the two aspects.Its products have reached advanced international level .