Sprinkler pump shell cracks, or impeller, leaf damage, or seal damage, will affect the degree of vacuum, water pumping, water pressure is too small or the phenomenon.
洒水车水泵泵壳出现裂纹、或者叶轮、倒叶损坏、或者水封破损，都会影响真空度，出现水抽不上来，或者水压过小的现象。
Here is the impeller of sea water pump, I think it isn't fit for use.
这里是海水泵叶轮，我认为它不适合使用。
The problem of cavitation of water pump impeller was solved by means of localized treatment of the sealing ring of circulating pump.
通过采用新技术，对循环水泵密封环进行局部加工，解决了水泵叶轮汽蚀问题；
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