交通优先信号灯是圆形的，安装在普通信号灯的顶瑞，在深色背景上显示白色竖条信号。
The round signal is on top of a regular traffic signal and shows a white vertical bar on a dark background.
该装置应包含测量接收机各项主要功能，能够用于普通信号（函数）发生器的计量检定（校准）。
The apparatus shall be furnished with the main functions of a measurement receiver, and can be used for metering and calibrating ordinary signal (function) generators.
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