Home / Standards / JB/T 8905.4-1999 JB/T 8905.4-1999 Abolished 起重机用套装式减速器 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1999-06-28 Implementation 2000-01-01 Centralized Committee 国家机械工业局 Issuing Authority 国家机械工业局