The safety valve (overflow valve) works not normally.

安全阀（溢流阀）工作不正常。

youdao

Install overflow valve inside to control the normal operation of pump.

内装溢流阀控制泵的正常运行。

youdao

Install overflow valve inside to control the normal operation of pump.

内装溢流阀控制泵的正常运行。

youdao