Fan, pump, air duct, water pipe, vent.
风机，水泵，风道，水管，风口。
It is an important topic in front of us to save energies of fan pump.
如何使风机水泵更好的节能，成为摆在我们面前的重要课题。
Cascade Speed Control is a kind of reasonable scheme as fan and water pump etc.
对于风机、水泵类负载采用串级调速是一种合理的方案。
Cascade Speed Control is a kind of reasonable scheme as fan and water pump etc.
对于风机、水泵类负载采用串级调速是一种合理的方案。
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