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Integrated elevator self-rescue device and control method thereof
Display equipment for computer image acquisition equipment
Airplane front wheel deflection angle measuring mechanism
Door leaf structure convenient for installing and maintaining lamp strip
Parking fence adjusting method, device, server and system
Remote isolation device for LS locking device door system
Anti-skid braking control method for flying-wing unmanned aerial vehicle
Shallow-tray grain ration heater with multiple waste heat collecting systems