succeeding pump
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真空泵的启动顺序为：首先打开工作液阀门，向泵内注入工作液，然后启动电动机，再次打开吸气管路，正常工作；
Vacuum pump's start order is: First turns on the driving fluid valve, pours into the driving fluid to the pump, then the starting motor, turns on the inspiration pipeline once more, normal work;
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