2021-01-16 Polyurethane sandwich panel, PU sandwich panel Polyurethane sandwich panel, PU sandwichpanel:The product is composed of two-layer moldedmetal panels (or panels of other materials) and a polymer thermal insulationcore that is foamed and matured directly in the middle of the panel. Thesesandwich panels 共40记录 < 1... 1011121314 >