Home / Standards / GB/T 1974-2003 GB/T 1974-2003 Active Tangential keys and keyways 切向键及其键槽 Standard Type GBT ICS 21.120.30 CCS J18 Status 现行 Issue Date 2003-06-05 Implementation 2004-02-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委