A.stand-by engine
B.full ahead
C.finished with engine
D.full away
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A.top
B.middle
C.bottom
D.any of the above
A.compressing
B.interposing
C.imposing
D.pounding
A.has to be handled
B.may be handled
C.has being handled
D.will be handling
A.air
B.heat
C.sludge
D.steam
A.for the release of air
B.for the release of water
C.in order to the release of air
D.because the release of air
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