名词
中文翻译：Unknown
同义词：
['switch valve', 'shift mechanism', 'gear shifter例句：1. The engineer needs to replace the old shift valve with a new one.（工程师需要用新的换向阀替换旧的。）']
例句：
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2.
用于机械的
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3.
车辆或飞机等的
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1. The engineer needs to replace the old shift valve with a new one.
工程师需要用新的换向阀替换旧的。
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2.The car's shifting mechanism is faulty and needs repair.
汽车的换挡机制出了故障，需要修理。
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3.The pilot had to switch the plane's gear shifter to the second gear for takeoff.
飞行员不得不把飞机的换挡器切换到第二档以准备起飞。