A.After
B.before
C.inside
D.outside
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A.lower
B.higher
C.low
D.high
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
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