The withdrawing of the cylinder liners, in general, depends on their （）.This may amount to approximately 1/120 of the diameter in some engines.<br>A:correct maneuvering<br>B:wear<br>C:working efficiency<br>D:maintenance

The withdrawing of the cylinder liners, in general, depends on their （）.This may amount to approximately 1/120 of the diameter in some engines.
A:correct maneuvering
B:wear
C:working efficiency
D:maintenance

出自：海船船员证

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