... Four corner locked, foaming cement infilled, Structure:OA-500 steel raised floor is made of good quality deep ... and coated by epoxy powder.The panel is filled with foamed cement inside.Compareing to traditional raised floor,trunking ... to sub-floor.3.The panel surface is coated with exoxy powder,and it is gentle glow,anti- ... where requires dust-proof and water-proof OA 500 steel raised floor with trunking