N 77 标准查询与下载
共找到 3 条与 相关的标准，共 1 页
Technical regulations for phased array ultrasonic testing of bolts
- ICS
- 77.040.01
- CCS
- N 77
- 发布
- 2021-03-11
- 实施
- 2021-04-11
Technical specification for phased array ultrasonic testing of welded joints of medium and large diameter pipelines
- ICS
- 77.040.01
- CCS
- N 77
- 发布
- 2021-03-11
- 实施
- 2021-04-11
Pile Multi-span Hole Acoustic Tracking Instrument
- ICS
- 91.220
- CCS
- N 77
- 发布
- 2013-09-13
- 实施
- 2014-02-01
