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1.The proportioning valve is used to regulate the flow of gases in a system.
配比阀用于调节系统中气体的流动。
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2. The engineer adjusted the proportioning valve to optimize the performance of the engine.
工程师调整了配比阀，以优化发动机的性能。
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3. The proportioning valve was responsible for ensuring that the temperature in the room was consistent.
配比阀负责确保房间内的温度保持一致。