A.輪輻 B.輪心 C.輪箍 D.輪緣
A.軸箱 B.電機(jī)懸掛裝置 C.牽引電機(jī) D.傳動(dòng)大齒輪
A.主斷頭先分?jǐn)?br /> B.隔離開(kāi)關(guān)先分?jǐn)?br /> C.主觸頭、隔離開(kāi)關(guān)同時(shí)分?jǐn)?br /> D.主觸頭、隔離開(kāi)關(guān)延時(shí)分?jǐn)?/p>