A.filled
B.evacuated
C.compressed
D.charged
第1题
A.of crosshead type
B.of trunk piston type
C.of low speed type
D.all the above
第2题
A.Holding the valve open for a long period
B.Increasing the starting air pressure used
C.Opening the stating air valve quickly
D.Reducing the starting air valve size
第3题
A.throttling the pressure line
B.changing the speed of the rotor
C.either A or B
D.None of the above is tree
第4题
A.a mooring winch
B.a hoisting winch
C.a slewing winch
D.a luffing winch
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