Home / Standards / GB/T 7734 GB/T 7734 Active Method for ultrasonic testing of clad steel plates 复合钢板超声检测方法 Standard Type GBT ICS 77.040.20 CCS H26 Status 现行 Issue Date 2015-12-10 Implementation 2016-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会