Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）<br>A:decrease the time required between cleanings<br>B:removes all large and small foreign objects<br>C:ensure a positive flow of oil at all times<br>D:ensure that all lube oil has been treated twice

Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）
A:decrease the time required between cleanings
B:removes all large and small foreign objects
C:ensure a positive flow of oil at all times
D:ensure that all lube oil has been treated twice

出自：海船船员证

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