The critical nature of control valve operation comes through when comparing the answers to a number of questions.
在控制阀关键工作性质来比较时，通过对一些问题的答案。
Install overflow valve inside to control the normal operation of pump.
内装溢流阀控制泵的正常运行。
High sensitive electromagnetic valve control the flow of water, the servo control system, the operation is extremely simple.
高灵敏电磁阀控制水流，随动控制系统，操作异常简便。
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