efficiency of breaking rock
efficiency of breaking rock
破岩效率
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Experiment shows the rock breaking efficiency of jet flow impact pressure is enhanced.
实验表明，提高了射流冲击压力的破碎岩石效率。
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The main factors that influence the efficiency of rock-breaking are the down-hole rock properties and the rock-breaking tools and methods.
其破岩效率的主要影响因素是井下地层岩石性质、破岩工具和方法。
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