Rail train head and tail positioning equipment redundancy and switching system and method
Quay crane assembling method and quay crane assembling body transporting device thereof
Pure electric cement mixer loading electricity taking control circuit and method
Preheating method and system for extended-range vehicle type battery and vehicle
Power battery voltage-reduction circuit and power supply system
Positioning system after unmanned aerial vehicle flight fault and unmanned aerial vehicle system
Pedal calibration method and device, storage medium and electronic equipment
Part mounting method for trapezoidal structure of container crane
Offshore floating photovoltaic power station anchoring device and construction method thereof