70 thick concrete C20 (3x3m parting, sealant caulking, inside the steel bi-directional, reinforcing mesh welding or assemblingThick low-intensity mortar layerInsulation layer: compressive strength 150Kpa thick extruded polystyrene foam board)Waterproof layer: 1.5 thick polyurethane waterproofing coatings (ⅱ) +1,2 thick PVC waterproofing membrane (part one)
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