In the shafting management （） should be paid more attention.
Ⅰ.f the while metal tailshaft bearing is dripping oil
Ⅱ.f some area become blue during the running
Ⅲ.he deformation of crankshaft

A.the rotate speed fluctuation
B.the ventilation tube clogged
C.the main engine accelerate so fast
D.stormy waves

A.dropping lube oil for lubrication, reducing the pollution to the sea
B.setting a temporary gravity oil tank and enhanced the position properly
C.lubricating with the used lube oil
D.lubricating with the fresh water and navigation in a lower speed

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