During the deck repair,（） should be measured firstly before tail shaft is drawn out.
- Athe sinking of tail shaft
- Bthe clearance of stern bearing
- Cthe total flexure of both end bearing
- Dmain engine crankshaft deflectio
问题
During the deck repair,（） should be me
参考解析：
分类：船舶电气与船舶安全题库
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