单选题Time delayed or delayed action-type fuses are designed to （）.Aprevent grounds in branch circuitsBprevent opens in motor circuitsCpermit momentary overloads without meltingDguard lighting and electronic circuits
单选题
Time delayed or delayed action-type fuses are designed to （）.
A
prevent grounds in branch circuits
B
prevent opens in motor circuits
C
permit momentary overloads without melting
D
guard lighting and electronic circuits
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名词解释题delayed hypersensitivity