Home / Standards / GB/T 33888-2017 GB/T 33888-2017 Active Non-destructive testing instruments—Characterization and verification of ultrasonic thickness measuring equipment 无损检测仪器 超声测厚仪特性与验证 Standard Type GBT ICS 19.100 CCS N77 Status 现行 Issue Date 2017-07-12 Implementation 2018-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A