Characterization of hexagonal ɛ-Ga1.8Sn0.2O3 thin films for solar-blind ultraviolet applications
Phase modulation method and system for reducing shadow time on lunar orbit by using orbit transfer
Aircraft air inlet transmission mechanism capable of adjusting throat flow in servo mode
Construction method of underpass main line ramp bridge steel box girder
Aircraft air inlet channel without interference on air flow
Outdoor sample collection device and working method thereof