multiplex transmission

This paper states the first opened digital railway division communication system which is constructed with Δ M multiplex transmission system and digital division telephone switching system on the toll symetrical cable at Zhengzhou-Luoyang Railway Division.

本文介绍了在郑州&洛阳区段的长途对称电缆上开通的我国铁路第一个数字式区段通信系统，它由△M多路复用传输系统和数字式区段电话交换系统构成。

Especial as fiber laser sensor, it has particular characteristics of safety, remote controller, small bulk and anti-electromagnetic disturbance. It has potential application for defence due to its high sensitivity and the feasibility of multiplex transmission using WDM technology.

特别是作为光纤激光传感器，它具有对电磁场的抗干扰、安全、体积小、可远程控制等特性，并且由于它的高灵敏度以及利用WDM技术实现多路传输，在军事上也有很大的应用潜力。