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單項選擇題

Before starting an air compressor, It should be （）.

A.unloaded
B.primed
C.filled with water
D.greased

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單項選擇題

Before starting an air compressor, It should be （）.

A.turned
B.oil level checked
C.filled with water
D.A and B

單項選擇題

The air compressor pumps air to the（）.

A.engine cylinder
B.air bottle
C.evaporator
D.condenser