drainage conduit, drainage conduit fittings, sewage conduit, sewage conduit fittings, water supply conduit, water pipe fittings Shanghai Total Industrial Co., Ltd. is producing and exporting rigid conduit, flexible conduit, ripple conduit, metal conduit, PVC conduit, conduits and fittings, electrical conduit, drainage conduit and fittings, sewage conduit and fittings, water supply conduit and ...