A deepwell pump is a type of().
A、screw pump
B、centrifugal pump
C、eductor
D、gear pump
A、screw pump
B、centrifugal pump
C、eductor
D、gear pump
A、centrifugal pump is cheaper than reciprocating pump B、the size of centrifugal pump with same capacity is smaller than that of reciprocating pump C、centrifugal pump makes maintenance easier than reciprocating pump does D、all of the above
A、Pump only if the discharge is led to a shore tank or barge B、Pump only during the hours of darkness C、Pump only on the outgoing tide D、Pump only as much as is necessary
A、one fixed power pump and one portable hand pump B、one fixed hand pump and one portable hand pump C、two portable hand pumps D、either "A" or "B"
A、centerline of the pump and the level of the liquid in the suction well when the source of liquid is below the pump B、centerline of the pump and the suction liquid level when the source of liquid is above the pump C、centerline of the pump and the level of the discharge liquid D、liquid levels of the suction and discharge