U. S. FederalRailway Administration Research and Development Office developed a track surface and underground rock movement investigation system.
美国联邦铁路局研究开发办公室通过一项研究项目。开发出一种轨道表面及地下岩土移动勘测系统。
2
It has also developed software for SBB, the Swiss FederalRailway, so that passengers can scan 2-d bar codes on trains and at stations to call up timetables.