Check for faulty fill valve operation.
检查有问题的进水阀门状态。
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Upper and lower bushings are standard for smooth valve operation.
上部和下部衬套符合流畅平稳轻松操作阀门的标准要求。
Valves with this option have a hand wheel mounted on top of the actuator for manual valve operation.
配置这种备选件的阀门在执行器顶部安装一个手轮用于手动阀门操作。
Six years after Monk's death, Nica passed away, aged 74, after undergoing a heart valve operation.
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Without a valve replacement operation, half of these patients die within two years, yet many are too weak to have one.
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