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單項(xiàng)選擇題

During working of an air compressor, （） should be drained.

A.oil sump
B.oil separator
C.outlet pipe
D.inlet pipe

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單項(xiàng)選擇題

During working of an air compressor, （） should be drained.

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

單項(xiàng)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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