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Hole Opening

Hole Opening

Hole Opening

Hole Opening

1

The Drilling Fluid Techniques Used in Pilot Hole and Hole Opening Operation of CCSD

中国大陆科学钻探先导孔及扩孔钻井泥浆工艺

2

Careful observation , regular breathing hole opening and closing ;

仔细观察，呼吸孔常会一开一关；

3

Hole opening and strengthening on the pressure vessel

压力容器开孔与补强

4

it Linglong hole opening , is an open mind ;

它孔窍玲珑，可谓是虚心；

5

The study on the hole opening for the non-stopped oil transmission pipe

输油管道不停输开孔技术研究

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