Home / Standards / GB/T 40730-2021 GB/T 40730-2021 Active Non-destructive testing—Measuring thickness by electromagnetic ultrasonic pulse-echo 无损检测 电磁超声脉冲回波式测厚方法 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 国家标准委 Drafting Unit N/A