An experimental unit for measuring instantaneous speed of high speed train passing through tunnel with a photoelectrical switch is designed.

设计了一套采用光电开关测量高速列车进出隧道瞬时速度的实验装置。

youdao

Tracking path is one of basic task for the LHD unit auto-drive, sometime midline of tunnel is considered as the LHD's expectation path.

路径跟踪是实现地下铲运机自动化作业的基本任务之一，一般在规划要求跟踪的路径时以巷道路面中心线为期望路径。

youdao

The extruder is outfitted with automatic self-loader, a tunnel for moving unit and long-life net.

挤出机配有真空自动上料机，行走机构，长寿换网等装置；

youdao

Intensely radioactive water from reactor Unit 2 is filling a nearby tunnel faster than workers can empty it, and radioactive levels of seawater near the plant increased sixfold following an aftershock on Saturday.

FORBES: Conditions May Be Deteriorating at Japanese Nuclear Power Plant