名词
中文翻译：Unknown
同义词：
["转速表，转速计，转速表头，转速表头例句：1. The car's tachometer head is showing the speed.（汽车的转速表显示了速度。）"]
例句：
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1. The car's tachometer head is showing the speed.
汽车的转速表显示了速度。
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2. The engineer checked the tachometer head to ensure the engine was running smoothly.
工程师检查了转速表以确保发动机平稳运行。
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3. The mechanic replaced the tachometer head, which had been damaged during the accident.
机械师更换了受损的转速表头，事故中该部件被损坏了。