Avoid continued operation within the cavitation zone.

避免在空穴区域内持续运行。

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Operation of valves continually in the cavitation zone should be avoided.

应该避免在空穴区域内持续运行阀门。

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The larger tension stress in the hydraulic turbine blades, grain coarsening in the heat-affected zone and the causticity of fluid medium are the major causes of cavitation erosion.

水轮机叶片有较大的工作应力、热影响区的晶粒粗大以及水介质的腐蚀性是产生机械腐蚀疲劳汽蚀的重要原因。

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