Home / Standards / GB/T 20967-2007 GB/T 20967-2007 Active Non-destructive testing - Visual testing - General principles 无损检测 目视检测 总则 Standard Type GBT ICS 19.100 CCS J04 Status 现行 Issue Date 2007-07-02 Implementation 2007-12-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委