Closer throttling, creating higher pressure drops may cause cavitation or excessive velocities which could cause high noise levels, vibration and possible damage to the valve or adjacent piping.
如果节流较小，将因此产生更高的压降将可能导致空穴现象或超快流速，从而导致噪音太高，振动剧烈，可能损坏阀门或相邻的管路。
There is no cavitation damage and irrigation water and so on.
不存在汽蚀破坏及灌引水等问题。
There is no cavitation damage and issues such as irrigation water.
不存在汽蚀破坏及灌引水等问题。
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