单选题Which pump installation would require an external source of sealing water?（）AMain circulator pump jacket water coolingBSalt water service pumpCAuxiliary condensate pumpDBilge pump
单选题
Which pump installation would require an external source of sealing water?（）
A
Main circulator pump jacket water cooling
B
Salt water service pump
C
Auxiliary condensate pump
D
Bilge pump
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