[課業] 電工機械題目請益
有兩題電工機械問題,想了很久,請高手幫忙解惑,感謝
http://i.imgur.com/wKna2J3.jpg
![](https://i.imgur.com/wKna2J3.jpg)
![](https://i.imgur.com/5Dfo5PL.jpg)
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