The foundation of automatic block and cab signal is track circuit.

自动闭塞和机车信号的基础是轨道电路。

This paper shows the main subsystems of the digital track circuit design of sending subsystem.

本文给出了数字轨道电路中主要系统——发送系统的设计方案。

It is a special power supply equipment designed recently for ut track circuit without insulation.

该电源屏是我厂最新研制的为ut无绝缘轨道电路提供电源的专用区间供电设备。

Impedance transformer is one kind of main equipment of track circuit in electrification district.

扼流变压器是电化区段构成轨道电路的主要设备之一。

Compared with the track circuit, this system was not only informative, but also safe and reliable.

这种方式与轨道电路相比，不仅信息量大，而且安全可靠。