A. 挖方路段 B. 高填方路段 C. 填方路段 D. 半填半挖路段
A. 贴里 B. 罩甲 C. 搭护 D. 马面裙
A. shunt B. high-resistance coil in the armature circuit C. low-resistance coil in the armature circuit D. shunt and a coil of high resistance
A. 正确 B. 错误