Home / Standards / SY/T 5446-1992 SY/T 5446-1992 Abolished 油井管无损检测方法 钻杆焊缝超声波探伤 Standard Type SY ICS N/A CCS N/A Status Abolished Issue Date 1992-04-27 Implementation 1992-10-01 Centralized Committee 能源部 Issuing Authority 能源部