steel pipe,S235JR grade,black tube 是什么钢管,CEV:lower than 0.35% ,

steel pipe,S235JR grade,black tube 是什么钢管,CEV:lower than 0.35% , overroll steel pipe是什么 CW steel pipe是什么钢管? stainless steel pipe(H-D12) steel pipe sleeve and penetraiton什么意思? ductile iron,steel or HDPE pipe 英语翻译Line Pipe,Carbon Steel Seamless,Size 6,W.T 0.375,accor.to API - 5L ,Gr B,End Beveled,Black Bar,DRL ( 12 ) M.L,Qty= 7000 M. 请问black ew steel pipe 标准为A53 B stainless steel lance pipe 是什么管,什么标准?主要应用领域？ stainless steel and other pipe fittings什么意思 钢管怎么译?是steel pipe还是steel tube?都能用?那两者有什么不同? Pipe China steel pipeIs China National Building Material International Corporation( CNBM) the largerst STEEL PIPE manufacturer in China? pipe(smls) mnpt astm a106 gr.b &zn asme b36 10m sch40 SEAMLESS PIPE,A106 GR.B,BE ASME B36.10M.S-40 分别代表什么? PIPE 30 ASTM A335 GR.P9 SMLS SCH.40 QUANTITY 24 MT 急, electro 316L stainless steel pipe with electro polish,其中的electro polish怎么理解? 英语翻译翻译成英文就行了Bearings Steel Pipe manufacturing base