Home / Standards / GB/T 14231-2021 GB/T 14231-2021 Active Determination of efficiency for gear units 齿轮装置效率测定方法 Standard Type GBT ICS 21.200 CCS J17 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 国家标准委 Drafting Unit N/A