May 2021 3 40 Report
有關電力問題

可以詳細一點解釋索掣, bar, 刀掣的分別,

和供電的整個流程嗎?

單相, 三相是什麼? 可供電分別是多少?

成日聽人講d 電會撞, 是什麼意思?

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