This paper mainly introduces the traffic light system based on PLC control design.

本文主要讲述了基于PLC控制的交通灯系统设计。

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A scripted traffic light system, walls, sidewalks, poles, signs, stairways and SO much more!

脚本化的交通指示灯系统，墙，人行道，栏杆，标牌，楼梯和众多类似物件！

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Fast food outlets be encouraged to display traffic light system and it be mandatory where health claims are made.

鼓励快餐店使用红绿灯标签办法，并在食品标签健康声明颁布后强制执行。

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It added the newly-installed bollards, which are 7ft (2.1m) apart, and a traffic light system would enforce traffic regulations and protect the road from further deterioration.

BBC: Worle 'narrow gap' bollards to remain

Last year, he announced plans to classify the performance of English hospital trusts using a simple traffic-light system of green, amber and red.

ECONOMIST: Hospitals

It also called for a "traffic light" system in stores to mark out healthy and unhealthy foods, and for annual fat tests for children.

BBC: NEWS | UK | Wales | Cookery lessons 'to cut obesity'