交流计数信号
railroad AC counting signal
微电子交流计数电码自动闭塞
micro computer automatic block system with AC counting code track circuit
交通流参数估计
traffic flow parameter estimation
交流计算盘
alternating-current calculating board
交流计算器
alternating current computer
交流计算台
alternating-current calculating board
交流交换系统
countercurrent exchange system
交流数据采集装置
AC data acquisition device
交流数控调压
AC digital control voltage regulation