Seamless Steel Pipe/Tube, Carbon Seamless Steel Pipe/Tube, Seamless Pipe/Tube manufacturer / supplier in China, offering E235/1020 Precison Seamless Carbon Steel Pipe Suitable for Gas Springs En 10305-1, E235 Precison Carbon Steel Pipe Suitable for Automotive Pull Rods En 10305-1, Carbon/Alloy Steel Pipes Suitable for Precision Machining Operation En 10305-1 E235/E355/42CrMo4 and so on.