doorknob transition [經(jīng)濟(jì)學(xué)]門鈕形變換doorknob transformer [電子、通信與自動(dòng)控制技術(shù)]門鈕形轉(zhuǎn)換器doorknob capacitor 門鈕形電容器doorknob n.球形門把手doorkeeper n.看門的人doorjamb n.大門柱dooring n.門；門口；途徑doorhead n.門框上的橫木doorhandle n.球形門拉手；球形門把手doorframe n.門框=doorcase.dooreye 門眼,門鏡doored adj.有門的doorcase n.門框doorboy 勤雜員doorbell n.門鈴door-yard (n.) door-window 門窗door-ways n.門廊door-trip n.門開關(guān)door-to-door sale 直銷