Home / Standards / JB 2703-1991 JB 2703-1991 Abolished 微型永磁直流螺丝刀 Standard Type JB27 ICS N/A CCS N/A Status Abolished Issue Date 1991-06-27 Implementation 1992-07-01 Centralized Committee 机械电子工业部 Issuing Authority 机械电子工业部