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热继电器作用()

单选题

2021-09-01 23:33

A、A 短路保护      
B、B 过载保护     
C、C 过流保护    
D、D 过压保护 

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正确答案

B

试题解析

标签：青书学堂河北建筑工程学院现代控制技术PLc

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