單項選擇題

The air compressor pumps air to the （）.

A.expansion tank
B.combustion chamber
C.air receiver
D.evaporator

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單項選擇題

The air compressor pumps air to the （）.

A.air cylinder
B.combustion chamber
C.steam drum
D.expansion tank

單項選擇題

The （） stage air compressors are widely used on board the ship.

A.single
B.Ⅱ
C.Ⅲ
D.multiple