The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of（）<br>A:aluminum plates<br>B:lead cathodes<br>C:copper baffle plates<br>D:sacrificial zincs

The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of（）
A:aluminum plates
B:lead cathodes
C:copper baffle plates
D:sacrificial zincs

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