Power transmission line video image on-line monitoring device
Charging pile management system based on Internet of Things
Blind separation of sound sources from the principle of least spatial entropy
Deicing device of air shutoff valve and its freezing method
High-rise building three-dimensional modeling surveying and mapping method based on laser scanning
Vehicles with blinking turn signal in the loading box
Variable-speed rotor blade, coaxial unmanned helicopter and single-rotor unmanned helicopter