单选题If the analysis of used lube oil indicates a high content of iron particles, this could indicate（）Acorrosive deterioration of a bearingBinadequate air filtrationCexcessive ring and liner wearDexcessive cooling of lubricating oil
单选题
If the analysis of used lube oil indicates a high content of iron particles, this could indicate（）
A
corrosive deterioration of a bearing
B
inadequate air filtration
C
excessive ring and liner wear
D
excessive cooling of lubricating oil
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