A.Steam trap
B.Check valve
C.Separator
D.Strainer
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A.lobe type
B.screw type
C.axial piston type
D.volute type
A.increase the fuel oil temperature
B.decrease the fuel oil temperature
C.decrease the fuel oil supply pressure
D.increase the air supply
A.keyway
B.shaft
C.packing
D.valve
A.turbine
B.centrifugal
C.ejector
D.mixed flow
A.has learnt
B.have learnt
C.learn
D.are learning
最新試題
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（） is not installed on the main switchboar.
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