block signal
短语词组
- block synchronizing signal 块同步信号
- block k signal machine 闭塞信号机
- block received signal 数据块收到信号;码组收到信号
- BSS Block Synchronizing Signal 块同步信号
- Block Acknowledge signal 闭塞证实信号
- block control signal 块控制信号
- block for signal flag 旗索滑车
- BRS Block Received Signal 数据块收到信号
- block bell signal 闭塞铃信号 返回 block signal