Wheel-track combined type mobile stair climbing robot
Water quality monitoring bionic fish, water quality monitoring system and monitoring method
Vehicle-mounted fording depth detection and early warning apparatus
Variable-track current collector and electric vehicle
Use method of lifting appliance, lifting appliance and crane
Uniformly-stressed damping device and using method thereof
Telescopic rack structure for aerial survey unmanned aerial vehicle
Star catalogue fixing assembly based on shape memory alloy
Small celestial body star soil collector and collection method thereof