A.distribution boards
B.section boards
C.emergency switch boards
D.main switch boards
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A.distribution boards
B.section boards
C.emergency switch boards
D.main switch boards
A.ultra much space
B.universal medium system
C.unit machined space
D.unattended machinery space
A.the engine crankcase
B.the engine scavenge boxes
C.drain tanks
D.fuel tanks
A.regulate the fuel supply
B.maintain a constant fuel viscosity at the fuel valves
C.maintain efficient cooling
D.alter the fuel density
A.pressure
B.temperature
C.volume
D.specific gravity
最新試題
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（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
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