... . Low cost 2. easily installment 3. movable Sandwich panel Two sides of color steel or aluminum with high-density ... manufacturing of various polyurethane color steel panel, widely used in house, freezing house,clean room,garage door, roof , wall, antifire, sound ... Supervision Center GB8624-1997 standardPhenolic Foam Pre-insulated Ducting Panel Compounded color steel is of high strength, which takes ...