起飞几个小时之后，航空公司停止了所有通信，飞机应答器信号消失，无从定位，为这次空难事件盖上了神秘面纱。
Within a couple hours of departure, the airline ceased all communication and its transponder has never been located wrapping the tragic flight in a veil of mystery.
发射机应答器便会自动发出信号。
站间是以车载设备为主的，由无源点式应答器、GPS列车卫星定位系统、多机校核系统构成的列车信号引导系统。
The train signal guiding system (on board) consisting of passive intermittent responder, train GPS system, and multiple computer checking system are equipped on the section.
该智能应答器已完成了对炮位雷达信号的测试，取得了令人满意的效果。
The test for the intelligent responder is completed for the signal of the weapon location radar and the test result is satisfactory.
可以实现虚拟应答器、虚拟信号机，减少轨旁设备及维护工作量，大大降低系统成本。
It can reduce the cost of the train positioning system greatly by reducing trackside equipments and workload of maintenance.
可以实现虚拟应答器、虚拟信号机，减少轨旁设备及维护工作量，大大降低系统成本。
It can reduce the cost of the train positioning system greatly by reducing trackside equipments and workload of maintenance.
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