<dl id="7b6vm"><optgroup id="7b6vm"></optgroup></dl>

<p id="7b6vm"></p>

單項(xiàng)選擇題

Through a （） pump, the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers.

A.positive displacement
B.ejector
C.centrifugal
D.air compressor

你可能感興趣的試題

單項(xiàng)選擇題

In a （） the center screw is driven and the outer screws idle.

A.single screw pump
B.double-screw pump
C.triple screw pump
D.centripetal pump

單項(xiàng)選擇題

The discharge flow of a reciprocating pump is （）.

A.steady
B.in pulsation
C.continuous
D.large