塑料门窗为何销路不畅李湘洲我国塑料门窗行业自８０年代初开始发展，至今已有相当规模。目前已有塑料门窗型材生产线６７０条以上，门窗组装生产线约１４００条，已形成年产型材２１万吨、组装门窗２０００万ｍ￣２的能力，可为６０００万ｍ￣２至１亿ｍ￣２的建筑配套。... Reasons for the poor sales of plastic doors and windows Li Xiangzhou China’s plastic doors and windows industry began to develop since the early 1980s, and it has reached a considerable scale. At present, there are more than 670 plastic door and window profile production lines and about 1,400 assembly lines for doors and windows. The annual production capacity of 210,000 tons of profiles and 20 million m2 of assembled doors and windows can be achieved, and it can be 60 million m2 to 100 million m2. Architectural support. ...