As an alternative to the conventional seawater cooling system, is based on principles about cooler locations, （）flow control and preheating, but with a central cooler and one additional set of pumps（）.<br>A:the central cooling system, different<br>B:the central cooling system, the same<br>C:the open cooling system, different<br>D:the open cooling system, the same

As an alternative to the conventional seawater cooling system, is based on principles about cooler locations, （）flow control and preheating, but with a central cooler and one additional set of pumps（）.
A:the central cooling system, different
B:the central cooling system, the same
C:the open cooling system, different
D:the open cooling system, the same

出自：海船船员证

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