... back.6)Walkway plate: 3mm thick embossing steel plate7)Floor board: 15mm multi-plywood or bamboo panel.8)Hardware: All ... or aluminum ceiling for wet rooms, mineral wool ceiling board for other office, living room and other dry area.3 ... High voltage) system: Indoor wires, sockets, switches, lamps, wire channels, distribution box, etc., Chinese standard.6)Sanitary appliance: Wash basin, shower, toilet ...