*$_When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an?

*$_When the head pumped against is less than the head of the fluid use

1.	*$_When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an?
A.	Ejector
B.	Blower
C.	Injector
D.	Airlift
Answer» E.

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*$_When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an?

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