Shanghai plans to introduce urban decorative lighting specifications or limit LED display brightness
At present, the bureau has completed the drafting of the draft of the Urban Environment (Decoration) Lighting Code, which is expected to be promulgated this year. It is emphasized that, according to the different functional properties of the region, the ambient brightness is divided to form four types of ambient brightness regions, and the maximum limits of the brightness of advertisements, signs, LED electronic displays and building exterior walls of different categories are made. Clearly defined. According to the urban construction layout, regional functions and cultural features, Shanghai will also organize the planning of urban landscape lighting facilities, rationally arrange landscape lighting facilities, control the scale of development, and reduce the light pollution caused by landscape lighting to citizens' lives.
Precision machining is a kind of machining, which is a workpiece to meet the requirements of the drawing of the line tolerance of the processing process, the workpiece in this process, will have certain changes in their performance characteristics and shape structure.
There are mechanical processing, naturally there are corresponding parts, mechanical parts design as a mechanical major of a subject, is one of the popular majors of science students, is also one of the strongest engineering; At present, this major requires not only good knowledge of science and engineering, but also excellent drawing ability and spatial imagination ability. In addition, due to the development of domestic industry and the constant change of demand, the demand for personnel in the mechanical processing industry is also increasing, and the employment rate of mechanical majors can reach 95%.
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