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1. The modulation valve is usedto control the flow of gases througha system.
调制阀用于控制气体通过系统的流动。
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2. The engineers designed a newmodulation valve that could handle more datathan the old one.
工程师们设计了一种新型的调制阀，可以处理比旧型更多的数据。
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3. The modulation valvewas responsible for adjusting the frequency ofthe signal being sent out.
调制阀负责调整发送出去的信号的频率。