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【简答题】
电流继电器的吸引线圈应( )在主电路中。欠电流继电器在主电路通过正常工作电流时,动铁心已经被( ),当主电路的电流( )其整定电流时,动铁心才被( )。电流继电器的文字符号是( )。
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A.
an amount less than $100
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