名词
中文翻译：钻头
同义词：
['drill rod', 'drill bit', 'drill stem']
例句：
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1.The engineer needs to drill a new hole in the wall.
工程师需要在墙上钻孔。
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2.The drilling spool is made of stainless steel and can withstand high pressure.
钻杆由不锈钢制成，能承受高压。
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3.The drilling spool is essential for drilling through concrete.
钻杆对于穿透混凝土至关重要。