中央新闻纪录电影制片厂 Several cities and motorway networks have in depth site visitors-monitoring systems. A lot of of these cameras even so, are owned by personal corporations and transmit data to motorists' GPS systems. With the basic principle of full inside reflection, light rays beamed in the optical fibers can propagate in https://landenhibum.blogdanica.com/33708839/detailed-notes-on-cctv-systems