名词
中文翻译：Unknown
同义词：
['counterboring', 'counterdrilling', 'counterdrilling']
例句：
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1. The engineerused a counter boring machine to drill through the rock.
工程师使用一台反冲式钻机来钻透岩石。
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2.The counter boring process is essential for drilling deep into the earth.
反冲式钻孔过程对于深入地层钻探至关重要。
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3.The counter boring technique was developed to improve drilling efficiency.
反冲式钻孔技术被开发出来以提高钻探效率。