名词
中文翻译：比例阀
同义词：
['proportioning valve', 'proportional control valve', 'proportional flow restrictor']
例句：
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1. The proportioning valve regulates the amount of fluid flowing through the system.
比例阀调节通过系统的流体量。
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2. The engineer had to replace the proportional control valve due to its failure.
工程师不得不更换由于故障比例控制阀。
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3.The proportional flow restrictor is used to limit the flow rate of a liquid or gas.
比例流量限制器用于限制液体或气体的流速。