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1. The valve-control system is crucial for maintaining the proper flow of gases through the pipeline.
阀门控制系统对于保持气体在管道中正确流动至关重要。
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2. The valve-control valve was designed to prevent leaks during maintenance.
阀门控制的阀门被设计成在维护期间防止泄漏。
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3. The engineer used a special tool to adjust the valve-control valve to optimize the flow rate.
工程师使用特殊的工具来调整阀门控制阀以优化流速。