Separable backrest type device for improving safety and comfort of two-wheeled vehicle
Monitoring system and monitoring method for elevator braking slippage and traction wheel slippage
Voice interaction system for actively reducing noise of internal call and vehicle
Foot control anti-falling auxiliary device for two-wheeled vehicle
Elevator car accidental movement protection device and control method
Unintended car movement protection device, brake unit and control method of brake unit
Method for improving accuracy of geomagnetic parking stall detector
Multifunctional recreational vehicle with foldable roof
Venturi tube and automobile fuel steam desorption system