管用鋼 選購指南
大量供應40cr鋼管 Q235qC方鋼管 22Mng無縫鋼管
L175鋼管,,L175無縫管,L175無縫鋼管”” ;;13622081088/* /“““ L175鋼管,,L175無縫管,L175無縫鋼管應用:石油天然氣工業中輸氣、輸水和輸油用管 石油天然氣工業油氣井套管或油管用鋼管 產品標準,等級,鋼號: API 5L PSL1 L175/A25, L210/A, L245/B, L290/X42, L320/X46, L360/X52, L485/X70 PSL2 L245R/BR, L290N/X42N, L320N/X46N, L360N/X52N, L415/X60N API 5CT PSL1, PSL2, PSL3, H40, J55, K55, N80 GB/T 9711.1 L175, L210, L245, L290, L320, L360 GB/T 9711.2 L245NB,......