... tube, alloy steel tube, stainless steel pipe, oil pipe, the geological steel pipe cracking and other steel pipe, etc.Cold rolling (dial the) seamless ... pressure boiler tube, alloy steel tube, stainless steel pipe, oil pipe, the other steel pipe cracking outside, still include carbon steel, alloy ... MnB etc hot rolling steel or made of cold rolling mill. 10, 20, made of low carbon steel seamless tube ...