本路桥资料为：有防撞装置时计算船撞桥的力——铁路桥梁规范中船撞力公式的延伸修订
TAG标签：时计,公式,修订,桥梁,延伸
The power that anti-impact gear chronometer calculates a boat to bump into the bridge -- what the boat in railroad bridge standard hits force formula is outspread edit