单选题The shaft and spare parts（） should be well greased in order to avoid corrosion.Ain the store roomBin the cylinderCin the scavenge air boxDin the water box
单选题
The shaft and spare parts（） should be well greased in order to avoid corrosion.
A
in the store room
B
in the cylinder
C
in the scavenge air box
D
in the water box
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