[問題] 上班遇到的電路問題 無解中
A-----B---------C
A與C用電表量測導通
B與C用電表量測 導通
A與B用電表量測 導通
A的電壓是-3.3
B跟C都量不到電壓
AB比分別是Fuse兩端= =
這到底是啥問題啊
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