main line railway

基本解释

And the dynamic characteristics of trains flow in speed limit section of main-line railway are analyzed.
随后对干线铁路中限速区段交通流的特性进行了分析。
The machine is of the most advanced level in the world , and played an important role in speeding-up of railway main line in recent years.
该机械具有当今世界先进水平，并在近几年铁路干线提速中发挥了重要的作用。
At last this paper summarizes research methods of main line parameters of High-speed railway, such as the minimum radius of horizontal curves, length and alignment of transition curves.
总结了现行的高速铁路主要设计参数的研究方法，如最小圆曲线半径、缓和曲线线形及长度、竖曲线半径等参数的确定原则和方法。

The 740, 000 square-foot (69, 000 square-metre) building has a 1, 960 foot long main assembly floor, with a railway line running through the door—handy if you are making locomotives.
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