在城市道路上,总能见到各种窨井盖,它们归属于不同的部门,作用是保护好地面以下的各种线路、管道。可是,这路面上高凸或者凹陷的窨井盖,却也给行人或车辆带来了不少麻烦,轻则对车轮造成损害,重则引发交通事故。尤其是从今年4月开始,我国很多地区逐渐进入雨季。在这样的天气条件下,遍布城市大街 In the city road, always see a variety of manhole covers, they belong to different departments, the role is to protect the ground below the various lines, pipes. However, the high convex or concave manhole covers on the pavement also cause a lot of trouble for pedestrians or vehicles, causing damage to the wheels and causing heavy traffic accidents. Especially since April this year, many areas in our country have gradually entered the rainy season. In this weather conditions, all over the city streets