名词
中文翻译：Unknown
同义词：
['head drill', 'main drill', "drilling machine例句：1. The company's main drill is expected to be delivered next month.（该公司的主钻预计将在下个月交付。）"]
例句：
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1. The company's main drill is expected to be delivered next month.
该公司的主钻预计将在下个月交付。
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2. The head drill operator was responsible for the safety of the workers.
主钻操作员负责工人的安全。
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3. The drilling machine is used for extracting oil from underground.
钻探机用于从地下提取石油。