Home / Standards / JB/T 7757.1-1995 JB/T 7757.1-1995 Abolished 机械密封用圆柱螺旋弹簧 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1995-06-20 Implementation 1996-01-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部