A.VE磁鐵軌罩已經(jīng)關(guān)閉 B.噴嘴槽防護(hù)罩已經(jīng)關(guān)閉 C.針輥罩蓋已經(jīng)關(guān)閉 D.盤紙防護(hù)罩已經(jīng)關(guān)閉
A.30 B.60 C.90 D.120
A.1 B.2 C.3 D.4