Steel tubes . welded plain end tubes of commercial quality for general purposes at mean pressure . dimensions technical delivery conditions 鋼管.平均壓力下一般商業用平端焊接鋼管.尺寸交貨技術條件
Steel tubes . longitudinally welded plain end tubes for the food industry . austenitic stainless steels . dimensions . technical delivery conditions 鋼管.食品工業用縱向焊接光鋼管.奧氏體不銹鋼.尺寸.交貨技術條件
Steel tubes . welded plain end tubes of commercial quality with or without special delivery conditions . dimensions d superior or equal to 168 , 3 mm . technical delivery conditions 鋼管.帶或不帶特殊交貨技術條件的光端焊接鋼管. “ ”的尺寸大于或等于168 . 3mm .交貨技術條件