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双向编组站 double direction marshalling station
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It is possible to mount a double suction centrifugal pump impeller with the vanes facing in the wrong direction. This would cause the pump ______.A.head capacity to improveB.discharge to be reversedC.efficiency to decreaseD.slippage to decrease
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单选题A double suction centrifugal pump impeller has been installed in the reverse direction, and will ().A
have a greater head capacityB
operate with increased impeller efficiencyC
discharge through the suction side of the pump casingD
require more power to run the shaft
考题
名词解释题单向编组站 single direction marshalling station
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