Aircraft device with ultrasonic airflow cutting resistance reduction function
Elliptical crankset bicycle labor-saving and comfortable to ride
Anti-pinch detection method for rail transit safety door production
High-rise building elevator operation monitoring device and using method thereof
Bicycle with elliptical small crankset driving system
Air conditioner indoor unit mounting device and air conditioner indoor unit
Distributed Internet of Vehicles data processing platform
Core layers and composite articles with a variable basis weight
Vehicle door device, vehicle risk avoiding device and vehicle device control method
Full-automatic automobile searching device and automobile
Electromagnetic shielding device and distribution box
Parking lot berth management method, electronic equipment and storage medium
Method for overcoming power generation dead point of bicycle