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。
Use a device, the battery, then play a vacuum in shell steel vacuum pumping, are short, high efficiency.
采用一套装置，将电池壳体抽真空，然后打钢珠，抽真空时比较短，效率高。
Use a device, the battery, then play a vacuum in shell steel vacuum pumping, are short, high efficiency.
采用一套装置，将电池壳体抽真空，然后打钢珠，抽真空时比较短，效率高。
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