In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）<br>A:Condenser circulating water pump<br>B:Feed-water heater drain pump<br>C:Distillate pump<br>D:Air ejector condenser drain pump

In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）
A:Condenser circulating water pump
B:Feed-water heater drain pump
C:Distillate pump
D:Air ejector condenser drain pump

出自：海船船员证

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