| 摘要 |
A control device for automatically operating a bilge pump is located in a receptacle having, in its side wall, holes at a level below the predetermined level of liquid at which the control device is designed to start the pump automatically, and having an inlet through which liquid can be introduced into the receptacle at a greater rate than it can flow out through the holes, so that the liquid can rise to said predetermined level to effect testing of the control device and the pump.
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