Interpretation is the experience and process that caused industrial accidents. Just write it clearly, refer to the following: On the way home from work at around130 on June 22nd, employees of the company passed by the entrance of Yifeng Times Square on Zhongyuan Road, 50 meters to the west, and tripped over the sunken manhole cover when passing through the manhole, and fell off their bicycles, resulting in broken collarbones and ribs and serious facial injuries. This is to certify that.