[09/12/2016] 評價很好的電動削鉛筆機，OfficeGoods Electric & Battery Operated Pencil Sharpener for Home Office & School, Sharpens Evenly Every Time, Great for Everyone that Wants the Perfect Point，有三種筆尖可以選擇，可裝電池或使用插座，特價$26.95 USD。Prime免運費。哪裡買：amazon。