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Factory Price 50mm75mm100mm Metal PU/PIR/Polyurethane Composite Sandwich Panel Insulated Fireproof Rock Wool for High Rise Elevator, Find Details and Price about Building Material Metal Sandwich Panel from Factory Price 50mm75mm100mm Metal PU/PIR/Polyurethane Composite Sandwich Panel Insulated Fireproof Rock Wool for High Rise Elevator - Wuxi Shengming Green Building Materials Co., Ltd.