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person:("REN cheng")
Stabilizing assembly and gear ring transportation equipment
Device for assisting people with visual impairment in taking bus
Intelligent air outlet assembly and vehicle comprising same
Method and structure for enhancing crawler belt driving efficiency of driving wheel
ETC parking online transaction system compatible with license identification equipment
Control system for air outlet of air conditioner in vehicle and air conditioner for vehicle
Quad-rotor unmanned aerial vehicle with wadding suction device
Highway road condition monitoring and early warning device
Expressway ETC lane toll collection device and use method thereof
Real-time monitoring system and method for running speed of vehicles on highway
ETC (Electronic Toll Collection) equipment and use method thereof