(coaxial) cable (同轴)电缆AC transmission system 交流输电系统active filter 有源滤波器active load (P Load)有功负载active loss 有功损耗active power 有功功率alternating current (AC) 交流电ammeter电流表 amplitude modulation (AM) 调幅angle stability功角稳定 anode (cathode) 阳极(阴极)arc discharge 电弧放电arc suppression coil 消弧线圈arc-extinguishing chamber灭弧室 armature 电枢,(继电器的)衔铁asynchronous machine 异步电机automatic control 自动控制automatic meter reading (AMR)自动抄表automatic oscillograph 自动录波仪autotransformer 自耦变压器