问题描述：
[单选]
A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of（）．
A．water
B．babbitt
C．iron or steel
D．acid
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答案解析：无
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上一篇：A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the（）（1）MEP is lower and the scavenging air is cooling the exhaust gases
（2）valve overlap in a four-stroke
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