In a closed diesel engine freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the （）.<br>A:suction pressure regulator<br>B:thermostatic bypass valve<br>C:sea water temperature<br>D:water level in the expansion tank

In a closed diesel engine freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the （）.
A:suction pressure regulator
B:thermostatic bypass valve
C:sea water temperature
D:water level in the expansion tank

出自：海船船员证

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