an old icon theme once made for xfce, also keep in mind that it was based on a fixed color palette!
電源插座
48px、europlug、icons、inkscape、no protective-earth、power、rodentia_icons、socket、symbol、upload2openclipart
48像素、europlug、圖標、Inkscape中、沒有保護地球、功率、rodentia_icons、插座、符號、upload2openclipart
資料來源：openclipart ( https://openclipart.org/ )