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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 31438-2015 |
Steel thin-walled sonic-testing tubes for concrete bored piles 混凝土灌注桩用钢薄壁声测管 |
China National Standards bored |
 English PDF |
| GB/T 22131-2008 |
Practice for ultrasonic examination from bored surfaces of cylindrical forgings 筒形锻件内表面超声波检测方法 |
China National Standards bored |
English PDF |
| GB/T 6060.2-2006 |
Roughness comparison specimens - Ground, turned, bored, milled, shaped and planed 表面粗糙度比较样块 磨、车、镗、铣、插及刨加工表面 |
China National Standards bored |
English PDF |
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