A.flame retardant
B.moisture resistant
C.oil resistant
D.low conductivity
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A.Ring type
B.Fork type
C.Spade type
D.Push on pull off type
A.metal
B.wood
C.water
D.plastic
A.Stray current
B.Rated current
C.Starting current
D.Earth current
A.pump
B.the cylinder
C.the hunting gear
D.the rudder
A.transmitter
B.receiver
C.pipes
D.charging unit
最新試題
The treatment of the fuel oils involves storage, heating, filtering and（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
The cetane rating of diesel fuel is an indication of the （）
（） is not installed on the main switchboar.
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
The condensers located in various stages of a flash evaporator are cooled by（）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.