.轨道交通信号系统术语及缩写Term or Acronym/术语或缩写Description/说明A/DAnalogue to Digital数/模转换ABService brake rate as a function of a commanded braking profile.做为指令制动包络函数的运营制动率ACBAxle Counter Block计轴区块ACCAsynchronous Communications Controller异步通信控制器Accident/事故Any unforeseen event or occurrence resulting in injury or property damage.任何不可预知的造成伤害或财产损失的事件ACEAxle Counter Evaluator计轴评估ACRArea of Control Region (also see AOA).控制区地带（参见AOA）Active State/主用状态One of four
