A.lower
B.higher
C.low
D.high
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A.Water is heated into vapor on heating surfaces
B.Water is vaporized by pressure difference
C.There are no heating-transfer surfaces
D.There are more heating-transfer surfaces
A.high-pressure steam-driven air-ejector
B.motor-driven vacuum pump
C.water-motivated air eductor
D.centrifuge pump
A.condenser
B.flashing device
C.lashing device
D.vacuum pump
A.lower condensing
B.higher cooling
C.lower cooling
D.higher condensing
A.the oil feeding is stopped and replaced by admitting flushing water
B.the flushing water feeding is stopped and replaced by admitting oil
C.the feeding of dirty oil and flushing water is stopped
D.the feeding of dirty oil and flushing water is admitted
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