A.in the pert position
B.in the starboard position
C.in the neutral position
D.to be dismantled
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A.stop valves
B.pressure relief valves
C.balance valves
D.regulating speed valves
A.steam plants, electric motors and compressed air
B.diesel engine, hydraulic machinery and compressed air
C.steam plants, electric motors and hydraulic machinery
D.diesel engines, steam plants and hydraulic machinery
A.crane
B.hatch cover
C.windlass
D.steering gear
A.possible
B.necessary
C.practicable
D.impracticable
A.erosion
B.corrosion
C.pitting
D.dezincification
最新試題
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（） is not installed on the main switchboar.
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