Unmanned aerial vehicle air-drop delay triggering device and method
Double-layer rail, rail vehicle and rail traffic system
Rapidly-moving derrick lifting device for drilling machine
Airplane key parameter global real-time monitoring system based on satellite communication
New energy vehicle ordered charging method and device and storage medium
Longitudinal rear-drive transmission of hybrid electric vehicle
Detachable moving device for surrounding rock morphology acquisition
Winch mast sail surface synchronous lifting type hard wing sail
Satellite power supply system energy balance analysis method
Device and method for simulating microgravity of roll type solar wing extension rod component
Charging strategy making method and device using charging pile in reservation system
VEHICLE EMBLEM RAISING AND RETRACTING DEVICE, AND VEHICLE
Ship shunting lightering system and control method thereof
Underwater static sounding device with automatic climbing sonar