Engine driven pumps are primary pumps which run continuously when they are turned on.

发布于 2021-04-24 16:45:25
【单选题】
A The engine-driven pumps are the secondary pumps that operates infinitely after running.
B The engine-driven pumps are the main pumps that runs continuously during operation.
C The engine-driven pump is the major pump that works endless when it is switched on.

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