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1.The hammer valve gear is crucial for theproper functioning of the pump.
冲击阀齿轮对于泵的正确运行至关重要。
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2. The engineerswere working on a new design for thehammer valve gear.
工程师们正在为冲击阀齿轮设计一个新的方案。
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3. The manufacturerhas released a new modelof hammer valve gear that promisesto improve efficiency.
制造商推出了一款新的冲击阀齿轮模型,承诺将提高效率。