Flapping-rotor multi-flight-mode switching mechanism based on shape memory alloy
Helicopter with variable distance between main rotor and tail rotor
Storage battery pack mounting structure for solar sightseeing boat
Vehicle-mounted cooking and refrigerating all-in-one machine
Electric vertical take-off and landing aircraft with separable lift component
Electric vertical take-off and landing aircraft with separable lift components
Lifting appliance with temperature measurement and alarm functions