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