动词短语
中文翻译：在地下深处进行钻孔同义词
同义词：
['down-hole drilling', 'down-hole drilling', 'down-hole drilling']
例句：
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1. We need to up-hole drill the well before we can extract the oil.
我们需要在提取石油之前先钻探井。
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2. Up-hole drilling is a complex process that requires specialized equipment and expertise.
地下钻井是一个复杂的过程，需要专门的设备和专业知识。
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3. The company has been up-hole drilling in the area for several years now.
这家公司已经在该地区进行地下钻井好几年了。