18世纪中叶,昂热市附近有座大桥,当列队士兵正步通过时,桥身突然断裂,结果266人落水死于非命。事后调查,这座102米长的桥梁,所承受的载荷远未超出许可的范围,坍毁前也无任何损伤,这个谜当时谁也没有揭开。1906年的一天,俄国彼得堡封塔克河上的一座桥,也是在一队骑兵整齐的步伐通过时突然断裂。后来专家查明,造成这种事故的原因,是由于一种 In the middle of the eighteenth century, there was a bridge near Angers, and when the troops were passing through the bridge, the bridge suddenly ruptured, resulting in the death of 266 people. After investigation, this 102-meter-long bridge, the load is far beyond the permitted range, without any damage before the collapse, the mystery was not opened at that time. One day in 1906, a bridge on the Seaport River in Petersburg, Russia, burst suddenly as a team of cavalry passed its neat steps. Later experts found that the cause of such accidents is due to a