Until now the bridge is the longest span in the continuous rigid frame doublelinerailway bridge in our country.
该桥是目前我国最大跨度的预应力混凝土连续刚构铁路双线桥。
2
For investigating the air pollution in doublelinerailway tunnel by electric traction, we tested the air condition in Jundushan tunnel.
为了解电力牵引的双线铁路运营隧道空气污染状况，选择军都山隧道进行现场测试。
3
Using double layer container transport is an effective approach to reduce intense transport capacity of main railwayline in China and decrease container transport cost.