Meinten Sie:
person:("wang yanjun")
•
person:("wang yanyan")
•
person:("wang yanyu")
Cargo belly delivery system and method for large unmanned aerial vehicle
Material delivery system and method based on unmanned aerial vehicle
Automatic delivery system and method for goods in unmanned aerial vehicle cabin
Large unmanned transporter container unit freight system and loading method
Quenching car traction mechanism through pin exit alarm circuit
Disassembling and assembling method for bridge crane in limited space of underground powerhouse
Device for hoisting and positioning laminated slab on construction layer