Some （） lying in the starting air lines will give rise to corrosion and can cause water hammer.<br>A:air<br>B:moisture<br>C:cooling water<br>D:lubricant

Some （） lying in the starting air lines will give rise to corrosion and can cause water hammer.
A:air
B:moisture
C:cooling water
D:lubricant

出自：海船船员证

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