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关注：1
2013-05-23 12:21
求翻译：提高深部难钻地层的机械钻速是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
提高深部难钻地层的机械钻速
问题补充： |
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2013-05-23 12:21:38
Improve the ROP difficult to drill formation of deep
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2013-05-23 12:23:18
Deep and difficult to drill more of mechanical drilling speed dating
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2013-05-23 12:24:58
Enhances the depth portion difficultly to drill the stratum the machinery to drill fast
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2013-05-23 12:26:38
Deep formation of improving ROP
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2013-05-23 12:28:18
deep and difficult to increase the mechanical drill drill ground speed;
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