请问black ew steel pipe 标准为A53 B
请问black ew steel pipe 标准为A53 B
stainless steel lance pipe 是什么管,什么标准?
steel pipe,S235JR grade,black tube 是什么钢管,CEV:lower than 0.35
stainless steel pipe(H-D12)
steel pipe and fittings是什么意思
CW steel pipe是什么钢管?
我看到水管下单为 pipe nipple 1/4x16" stainless steel
ERW steel pipe manufactuer in China .
请问pipe binder是什么意思?
6D pipe bending for API 5L Grade B Pipe 12" Diameter.请问整句意思
stainless steel and other pipe fittings什么意思
PRODUCTION OF COLD DRAWN SEAMLESS STAINLESS STEEL TUBES/PIPE