Home / Standards / GB/T 2970 GB/T 2970 Active Method for ultrasonic testing of thicker steel plates 厚钢板超声检测方法 Standard Type GBT ICS 77.040.20 CCS H26 Status 现行 Issue Date 2016-02-24 Implementation 2016-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会