... wire, electric thread-passing pipes, circuit of machine tool, protective pipes of lamps and lanterns wire, ... machine, etc. This pipe has large market. Single wall corrugated pipe extrusion line designed and developed by Qingdao Xinsanjiu Machinery Co., Ltd ... contains Extruder, Corrugated Forming Machine, Mold Blocks, Cooling Equipment, Counting Machine and Winding Machine. It can continuously produce ...