Dc直流電風扇真的比較省電嗎？同風速下到底跟傳統ac電風扇的差別有多大呢？實際拿手邊的電風扇實測給你看看！14吋威技dc扇、禾聯dc扇、華元ac扇大pk！
Synopsis
常常聽別人說DC扇比較省電，但是也有人說是因為DC扇吹出來的風力比較小，所以才會比較省電，今天就來徹底實測一下，到底 ...
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