The bearing of tailshaft sealing equipment, which adopting the oil nature circulation is hot, the reason is（）<br>A:the rotate speed fluctuation<br>B:the ventilation tube clogged<br>C:the main engine accelerate so fast<br>D:stormy waves

The bearing of tailshaft sealing equipment, which adopting the oil nature circulation is hot, the reason is（）
A:the rotate speed fluctuation
B:the ventilation tube clogged
C:the main engine accelerate so fast
D:stormy waves

出自：海船船员证

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