T121-M数字无绝缘轨道电路  TI21-M digital jointless track circuit

轨道绝缘接头  insulated rail joint

轨道绝缘破损  rail insulation damage

无绝缘轨道电路  track circuit without insulating; Non-insulation Track Circuit; Non-insulated Track Circuit; jointless track circuit

轨道-轨道  rail-to-rail

赤道轨道  equatorial orbit

赤道轨道卫星  satellite equatorial orbit

单轨轨道交通  monorail mass transit

轨道、轨迹  orbit

环赤[道]轨道  equatorial orbit

环赤道轨道  equatorial orbit

环赤道轨道[天]  equatorial orbit

接近同步赤道轨道  near synchronous equatorial orbit

近同步赤道轨道  orbit; near synchronous equatorial

绝缘轨接头  insulated rail joint

绝缘轨枕  Research

双轨轨道回路  double rail track circuit

铁道轨道  Track; railway track

同步赤道轨道  synchronous equatorial orbit