Home / Standards / GB/T 39959-2021 GB/T 39959-2021 Active Liquid pumps and pump units—Noise test code—Grades 2 and 3 of accuracy 液体泵和泵机组 噪声试验方法 2级和3级 Standard Type GBT ICS 23.080 CCS J71 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A