名词中文翻译
中文翻译：倒车镗孔
同义词：
['reverse boring', 'counterboring']
例句：
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1.The car was under-reamed before the engine was installed.
在安装发动机之前，这辆车进行了倒车镗孔。
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2.The engineers were under-reaming the tunnel to make it wider.
工程师们在拓宽隧道进行倒车镗孔。
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3.The under-reaming process is essential for ensuring the smooth operation of the machine.
倒车镗孔过程对于确保机器顺畅运行至关重要。