Home / Standards / GB/T 38620-2020 GB/T 38620-2020 Active Methods of evaluating the performance of ultrasonic levelmeter 物位计性能评定方法 Standard Type GBT ICS 25.040.40 CCS N10 Status 现行 Issue Date 2020-04-28 Implementation 2020-11-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A