Home / Standards / JB/T 4212.4-1996 JB/T 4212.4-1996 Abolished 冷镦内六角圆柱头螺钉模具成形冲头 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1996-09-03 Implementation 1997-07-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部