Railway Digital Mobile Communication System
Railway Digital Signal Cable
high-speed railway digital signal cable
digital dispatch communication switch
digital dispatch communication system
Digital dispatch system
railway route selection；railway location；approximate railway location；location of railway route selection
China Railway and German Railway
Initial Construction Project of TRA Commuter Railway and Regional Railway
The Command Post of China Railway Wuju Corporation for Qinghai-Tibet Railway Construction
Digital 8 tape Digital 8
Digital Archived Digital Publish
Digital In-Analog Out Digital Audio Equipment
digital province and digital city
Digital Radiography Digital Radiograph
Digital Selective Calling Digital Selective Calling