... worms, Sand surface and sand surface with holes and so on.Edge: Square Edge, Tegular Edge, Concealed Edge, Super ... , especially for first-class buildings such as hotels, restaurants, large department stores, ballrooms, cinemas, stations, auditoriums, offices, guest halls, office ... X600X12300X600X14300X600X15300X600X12300X600X14300on the thicknessLR(Light Reflection)0.90Sound Insulation Grade30 MinFire ...