名词
中文翻译：闭锁式齿轮
同义词：
['closed-end gear', 'sealed-end gear']
例句：
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1.The old car had a cogged bit that made it difficult to start.
这辆旧车有一个闭锁式齿轮，使得它很难启动。
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2. The engineer replaced the cogged bit with a new one.
工程师用一个新的闭锁式齿轮替换了旧的。
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3. The cogged bit was causing the machine to run slowly.
闭锁式齿轮导致机器运行缓慢。