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Model : Windows-20 - China Wanxin Group-steel door, wooden door ...

It is an amazing fact that uPVC double glazing was sold by the industry as a maintenance free product. While it is true the uPVC frame will last approximately 10,000 years before degrading, the mild steal and cast Zink moving hardware parts will last an average of 10 years before they start to fail. The problem with window ...