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+person:("zhang, haiyang")
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+person:("zhang, haiping")
Agricultural unmanned aerial vehicle sprayer capable of controlling the spraying area
Aircraft wing loading section weight deduction protection device and method thereof
Airplane horizontal tail elevator maneuverability test device and method thereof
Anti-shaking protection device for lifting rope of crane
Artillery wheel universal assembly and disassembly vehicle
Automatic charging system and method for low-voltage battery of electric vehicle
Battery equalization method and battery equalization device
Combined lifting appliance for self-propelled gun engine compartment
Device for assisting people with visual impairment in taking bus