track jack

The paper analyzes the performance characters of hydraulic rail jack technology.

分析了现有液压起道机的技术性能特点,通过对液压起道机关键技术的设计,满足了铁道提速后的起道作业要求。

Track swelling accidents in seamless tracks occurred often in operation of track-lifting.

无缝线路中发生的胀轨跑道事故有相当一部分是在起道作业中发生的。