N80-1石油套管钢
N80-1 Oil Case Pipe Steel
含Cr油套管钢
Cr-containing well tube steel
SM 80SS特级抗硫套管钢
SM80SS super anti-sulfide tubing steel
SM80SS特级抗硫套管钢
SM80SS super anti-sulfide tubing steel
super anti-sulfide well tube steel SM80SS
N80S抗硫油管钢
Anti-sulfide tubing steel N80S
N80S anti-sulfide tubing