overroll steel pipe是什么

CW steel pipe是什么钢管? stainless steel lance pipe 是什么管,什么标准? stainless steel pipe(H-D12) steel pipe and fittings是什么意思 steel pipe,S235JR grade,black tube 是什么钢管,CEV:lower than 0.35 ERW steel pipe manufactuer in China . stainless steel and other pipe fittings什么意思 PRODUCTION OF COLD DRAWN SEAMLESS STAINLESS STEEL TUBES/PIPE 请问black ew steel pipe 标准为A53 B Stainless steel pipe Sch.# 10 S,Thickness 6 mm "钢管"怎么译?是steel pipe还是steel tube?都能用?那两者有什么不同? Tube和PIPE区别是什么?