synchronous system

Alternate signal system

互亮（换）号志系统

Simple or limited progressive system

单一（简单）递亮（续进）式号志系统

Dynamic traffic signal control

动态交通号志控制系统

a system of symbols and symbolic representations.

符号和符号标示的系统。

Cleared Lane Marking System

已排雷通道标志系统

cardinal marks of buoyage system A

浮筒系统A方位标志

photoluminescent exit marking system

荧光安全出口标志系统

secondary signal system

二级信号系统 次级信号系统

The Application of the Traditional Figures in the Logo Design;

中国传统图形符号在现代标志设计中的应用

The Perfect Combination of Chinese Traditional Auspicious and Modern Emblems;

中国传统吉祥符号与现代标志设计的完美结合

It is not Necessary to Unify Sequential Number of Books--Debate with Li Chunli;

“书次号完全不必统一”吗——兼与李春利同志商榷

On Relationship Between Ruling Class Will and Social Public Will;

论统治阶级意志与社会公共意志的关系

Photoelectric Signal & Systematic Analysis

光电信号与系统分析

nuclear magnetic resonance signal survey system

核磁共振信号观测系统

airfield ground lighting

飞行区地面灯号系统

remote auto-dialing warning system

遥距自动拨号警报系统

automatic dialling mobile telephone system

自动拨号移动电话系统

equal signal system

等信号无线电导航系统