micro-drilling

微小孔钻削,micro... ... ) Micro-drilling 微孔钻削 ) micro-drilling 微细孔钻削 ) Small-deep holes drilling 深小孔钻削 ...

微细孔钻削,mi... ... ) Micro-hole drilling 微孔钻削 ) Micro-drilling 微孔钻削 ) drilling of long and thin bore 细长孔钻削 ...

...的油井钻进。此外还包括微径钻进（micro-drilling）和超小径钻进（ultra-small-drilling），都采用绳索取心钻具系列，是一种 …