Sandwich Panels, Steel Structure Building, Prefabricated Building manufacturer / supplier in China, offering ASA Best Quality Prefab Rock Wool Panels Metal Side Cleanroom Sound Insulated Panel/950mm/980mm/1150mm, Factory Customized Pre-Engineered Steel Structure Industrial Supporting Frame, ASA Good Quality Thermal Insulation Fire Proof Two Flat Rock Wool Sandwich Panels/950mm, 1150mm and so on.