NSAP地址中的Area ID由()组成。 ["IDP","HODSP","System ID","NSEL"]
在AFC系统中,设备构成大致分为三个层次()。 ["第一层为中央计算机系统","第二层为车站计算机系统","第三层为现场AFC设备","第一层为现场AFC设备","第二层为中央计算机系统"]
SCH信道采用的卷积编码速率为1() ["1","2","3","4","5"]
RACH信道采用的卷积编码速率为1() ["1","2","3","4","5"]
自动售检票系统有几种类型车票媒介:单程票、()和测试非接触式智能卡。 ["多程票","储值非接触式智能卡","员工票","测试票","出站票"]
转标纺纱时转杯对纺纱质量影响如何?