25Hz微电子相敏轨道电路
25 Hz phase detecting track circuit
轨道电路自动站间闭塞
automatic station block with track circuit
计轴轨道电路
axle counting track circuit
计轴加轨道电路
Axle counter combined with track circuit
交流连续式轨道电路
AC continuous track circuit
数字编码式音频轨道电路
digital coded audio frequency track circuit
数字轨道电路
digital signal orbital signal circuit
digital track circuit
无接头轨道电路
jointerless track circuit
无绝缘轨道电路
jointless track circuit
track circuit without insulating
Non-insulation Track Circuit
Non-insulated Track Circuit
无砟轨道电路
Non-ballast Track circuit
相敏轨道电路
phase modulated track circuit
Phase detecting track circuit