Pesticide liquid spraying device for unmanned aerial vehicle
Vehicle head-up display instrument, data sharing method and vehicle
Intelligent feed feeding device for fish culture and feeding method
Light-weight hub bearing unit and treatment method for pretreating laser additive
Method for installing large-diameter air pipe in limited space
Power transmission and transformation line installation moving device
Preparation method of sterilizing and mildew-proof carriage plate and logistics vehicle carriage
Fire-fighting unmanned aerial vehicle with load-bearing function