Home / Standards / JB/T 2257.1-1992 JB/T 2257.1-1992 Abolished 板料折弯机技术条件 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1992-05-16 Implementation 1993-01-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部