ASTMA106GR.B无缝钢管-BN700SCH60
GR.6低温无缝钢管-42.2*3.56
GR.B无缝管-NPS4SCH40S
ASTMA106B美标钢管-610*59.54
GRB美标钢管-141.3*12.7
ASTMA333-6无缝钢管-NPS30SCH160
ASTM美标无缝钢管-457.2*45.24
ASTMA106-B无缝钢管-NPS10SCH40
ASTM美标无缝管-BN90SCH120
ASTM美标无缝钢管-NPS1/8SCH140