The pH value of water in a diesel engine closed cooling water system should be maintained between （）.<br>A:60 to75<br>B:80 to 95<br>C:100 to 115<br>D:120 to 135

The pH value of water in a diesel engine closed cooling water system should be maintained between （）.
A:60 to75
B:80 to 95
C:100 to 115
D:120 to 135

出自：海船船员证

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