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單項(xiàng)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(xiàng)選擇題

The air compressor pumps air to the （）.

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

單項(xiàng)選擇題

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

A.single
B.Ⅱ
C.Ⅲ
D.multiple

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