Home / Standards / GB/T 9239.21-2019 GB/T 9239.21-2019 Active Mechanical vibration—Rotor balancing—Part 21: Description and evaluation of balancing machines 机械振动 转子平衡 第21部分:平衡机的描述与评定 Standard Type GBT ICS 21.120.40 CCS N73 Status 现行 Issue Date 2019-10-18 Implementation 2020-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A