... tube rolling mill with quick-start roller and Grade-3 computer automatic control system, it ensures production precision scientifically and ... over 60,000 tons stock products, running specifications more than 3,000 kinds. Our production range: OD: 25-426 mm ... XINGLONG SEAMLESS TUBE MANUFATURING CO., LTDDavid John Sales ManagerAdd: No. 3 Taishan Road, Development Zone, Liaocheng, ChinaTel: +86-635- ...