Welded Pipe, Cold Rolled Precision Tube, Hydro-Cylinder manufacturer / supplier in China, offering ASTM A1020 A36 API 5L Round Carbon Pipe Precision Seamless Steel Tube, H8 Cold Rolled Seamless Honed Steel Tube Cold Drawn High Precision Pipe, Cylinder Rolling Tubes Precision Srb Cold Rolled Seamless Steel Hydraulic Cylinder Tube and so on.