单项选择题
When the vessel shafting are installed, the slightly inclined of the shaft line should be rectified by（）
A.adjusting the position of the intermediate bearing B.changing the position of the main engine installation C.adjusting the center line of the propeller D.changing the position of the thrust block
单项选择题 Setting a sealing equipment astern on the tailshaft can’t （）
单项选择题 In the process of the shafting management, special attention should be paid to（）
单项选择题 The main advantage of improved Simplex tailshaft seal are（）
