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22. 低压断路器____ 。( )

单选题
2021-09-01 19:12
A、有短路保护,有过载保护
B、有短路保护,无过载保护
C、无短路保护,有过载保护
D、无短路保护,无过载保护
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正确答案
A

试题解析

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