名词
中文翻译：限制孔
同义词：
['limiting aperture', 'throttling orifice']
例句：
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1. The valveis designed to limit the flow of gases through it.
阀门的设计是为了限制气体通过它。
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2. The engine needs to be checked regularlyto ensure that the limiting orificeis not blocked.
发动机需要定期检查，以确保限流孔没有被堵塞。
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3. The engineer adjustedthe throttle to limit the speed ofthe car.
工程师调整了节气门，以限制汽车的速度。