Home / Standards / SY/T 5561-1992 SY/T 5561-1992 Abolished 摩擦焊接钻杆焊区技术条件 Standard Type SY ICS N/A CCS N/A Status Abolished Issue Date 1993-02-22 Implementation 1993-08-01 Centralized Committee 能源部 Issuing Authority 能源部