Home / Standards / JG/T 5021-1993 JG/T 5021-1993 Abolished 气卸散装水泥输送车卸料管快速接头 Standard Type JG ICS N/A CCS N/A Status Abolished Issue Date 1993-04-14 Implementation 1993-10-01 Centralized Committee 建设部 Issuing Authority 建设部