盒子有不同的特点：如货架，悬挂轨道或穿孔的后壁。
The boxes have different features such as shelves, hanging rails or a perforated rear wall.
企业行为：悬挂轨道的直轨和弯轨，物料运输系统，气动钻机。
Activity: Running rails and curves for suspended monorails, material transport system, compressed-air cradle drilling machines.
列车荷载是一个很复杂的问题，同时涉及列车轴重、悬挂体系、行车速度、轨道组成、线路平顺等等因素。
Loading of trains is a complex issue. It involves many factors such as the axle weight, suspension system, traveling speed, track structure, geometric irregularity of lines and so on.
应用推荐