During the dock repair, should be measured firstly before tail shaft drawn out（）<br>A:the sinking of tail shaft<br>B:the clearance of stern bearing<br>C:the total flexure of shaft<br>D:main engine crankshaft deflection

During the dock repair, should be measured firstly before tail shaft drawn out（）
A:the sinking of tail shaft
B:the clearance of stern bearing
C:the total flexure of shaft
D:main engine crankshaft deflection

出自：海船船员证

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