In the summer, the process reverses, with the pump sending water and glycol into the pipe to help cool the house.
在夏季，程序正相反，地热泵会将水与乙二醇送入管道中以帮助房屋内制冷。
Continuously reciprocating piston movement, the pump suction and the pressurized water process is continuous alternately.
活塞不断往复运动，泵的吸水与压水过程就连续不断地交替进行。
The technology process and the control demands of a waste water pump are presented, and the design of hardware and software based on PLC for the pump station automatic control are described.
介绍了一个污水泵站的控制工艺和控制要求，阐述了泵站自动控制系统中plc的硬件、软件设计。
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