Water life-saving satellite positioning alarm method and terminal, and life jacket
Vehicle-to-vehicle charging system and method and electric vehicle
Vehicle control method and device for highway ramp in vehicle-road coordination environment
Unmanned aerial vehicle high-rise fire extinguishing bomb launching device
Safe energy-saving elevator and application method thereof
Safe energy-saving bilateral elevator and using method thereof
Precision control method for moving and folding giant block
Network rail tunnel comprehensive detection system and method thereof