三区国产成人精品一区二区,夜恋影院免费看A片,亚洲精品熟妇一区二区三区,午夜亚洲精品久久久影院,婷婷色国产精品视频一区二区 ,伦伦国产精品在线,国产一区二区三区高清视频,高清精品视频一区二区三区

Flat crossing safety protection device is the use of computer communication technology, image processing technology, signal processing technology, intelligent detection technology, sound and light technology, etc. to establish a set of integrated information management system integrating train approach alarm, road signal control, video surveillance forensics and emergency plan control. To achieve full coverage monitoring of all railroad rolling stock, motor vehicles and pedestrians entering and leaving the yard level crossing, to achieve the goal of "early detection, good control and good disposal", and to provide scientific management technical means for the safety supervision of the railroad level crossing in the yard.