Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.<br>A:hydraulic fluid contamination<br>B:excessive fluid friction<br>C:turbulent fluid flow<br>D:fluid pressure surges

Hydraulic machinery failures are commonly caused by misalignment of the system components and by （）.
A:hydraulic fluid contamination
B:excessive fluid friction
C:turbulent fluid flow
D:fluid pressure surges

出自：海船船员证

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