<li id="g8ry6"><dd id="g8ry6"></dd></li>

單項(xiàng)選擇題

Centrifugal pumps are non-positive and a fairly （） unit.

A.low pressure
B.low discharge
C.low speed
D.high pressure

你可能感興趣的試題

單項(xiàng)選擇題

Gear pumps are （） type because they discharge a near constant amount of liquid regardless of pressure.

A.positive displacement
B.non-positive displacement
C.mixed-flow
D.axial-flow

單項(xiàng)選擇題

（） are more suitable for large quantities at low pressure.

A.Reciprocating pumps
B.Rotary pumps
C.Centrifugal pumps
D.Gear pumps