Home / Standards / GB/T 30820-2014 GB/T 30820-2014 Active Nondestructive testing—Practice for determining the impedance of absolute eddy-current probes 无损检测 绝对式涡流探头阻抗测定方法 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2014-05-06 Implementation 2014-12-31 Responsible Dept 国家标准委 Drafting Unit N/A