Not only is the bridge equipped to handle four lanes of traffic; it also has a double-trackrailway.
这座桥不仅拥有四个行车道，还有一个双轨铁路。
2
In this paper the railwaytrack is considered as a double elastic system of both rails and sleepers and the vibration is described in detail with two partial differential equations.
本文将铁路轨道看作由钢轨和轨枕组成的双层弹性系统，用两个偏微分方程联立描述其振动。
3
Research conclusions: With the trains being-speed up, the transient pressure of double-track tunnel in the existing railway can not reach the standard of comfort.