... to process, and can save time and labor)4)High sound insulation and heat insulationProduct:We are a professional manufacturer ofPVC ... of over 100,000 square meters, including 50,000-square-meter office and production buildings, we are equipped with 100 ... boards, 40,000-square-meter multilayer window boards, 150,000-square-meter multilayer shelf boards, 2,500,000-square-meter polycarbonate boards, and 1 ...