Home / Standards / GB/T 24619 GB/T 24619 Active Synchronous belt drives—Curvilinear profile systems G、H、R and S belts and pulleys 同步带传动 G、H、R、S齿型曲线齿同步带与带轮 Standard Type GBT ICS 21.220.10 CCS J18 Status 现行 Issue Date 2021-05-21 Implementation 2021-12-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会