Elevator floor information recording and displaying method and system and elevator
Subway air conditioner low-temperature refrigeration mode operation control method
Modularly designed inland river small lithium battery powered ship and construction method
Ship overall design scheme based on vanadium redox flow battery power
Kangaroo-leg-imitating suspension with arc-shaped shock absorbers
Multi-stage refrigeration control method of railway vehicle air conditioning unit
Control method of split type railway vehicle air conditioning unit
Unmanned aerial vehicle three-dimensional precipitation enhancement system
Marine bubble resistance reduction device with water inlet flow channel
Measuring device for moving gap of aircraft aileron adjustment sheet
Airframe structure and unmanned aerial vehicle thereof