Home / Standards / GB/T 20736-2025 GB/T 20736-2025 Upcoming Fatigue test method for transmission precision roller chains and leaf chains 传动用精密滚子链和板式链疲劳试验方法 Standard Type GBT ICS 21.220.30 CCS J18 Status 即将实施 Issue Date 2025-12-02 Implementation 2026-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A