Due to the operating characteristics of the system time lag fuses(or dual－element fuses)are necessary for use in() A.main lighting circuitsB.motor starting circuitsC.emergency lighting circuitD.general alarm circuits
Due to the operating characteristics of the system time lag fuses(or dual－element fuses)are necessary for use in()
A.main lighting circuits
B.motor starting circuits
C.emergency lighting circuit
D.general alarm circuits
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