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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

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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

單項(xiàng)選擇題

The air filter is fixed in the （） of an air compressor.

A.inlet pipe
B.outlet pipe
C.inter cooler
D.after cooler

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