《轨道安全标准》（《联邦法典》第14卷第213部分）根据最大容许速度，就九个等级的铁轨明确了要求。
The Track Safety Standards (49 CFR Part 213) specify requirements for nine classes of track based on maximum allowable speed.
介绍了采用反算法计算悬挂运输设备轨道的容许集中荷载标准值的公式及其应用图表。
Formula for calculating standard values of allowable concentrated loads in railway of hanging lifting equipment is introduced by using reversed calculation and their application.
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