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【日常の質問No.156】2019年6月5日

2019-06-05View Original

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この投稿は Green Lotus によって最終編集されました: 2019-6-6 23:17 【毎日の質問 No. 156】 2019 年 6 月 5 日の交流の周波数は 50Hz で、電流の方向は 1 秒間に 50 回変わります。 正誤質問 () 2 日以内に回答してください。

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