由总参工程兵第四设计研究所研制成功的新型工程材料——复合玻纤风管,现已由杭州恒德新型材料有限公司投入批量生产。多年来,我国通风、空调装置一直沿用传统的铁制风管,管件笨重,加工、安装难度大,防腐性能差。第四设计研究所为消除上述弊病,经反复研究,终于试制成功复合玻纤风 The new engineering material successfully developed by the Fourth Design Research Institute of the General Staff Engineer, the composite fiberglass air duct, has now been put into mass production by Hangzhou Hengde New Material Co., Ltd. Over the years, China’s ventilation and air conditioning units have been using traditional iron air ducts, which are bulky and difficult to process and install, and have poor corrosion resistance. In order to eliminate the above-mentioned drawbacks, the Fourth Design Institute has, after repeated research, finally succeeded in trial-producing composite glass fiber winds.