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person:("LIU yunlong")
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person:("LIU yanhong")
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person:("LIU yuhong")
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person:("LIU junhong")
Electric unmanned aerial vehicle fire-fighting command vehicle
Unmanned aerial vehicle vehicle-mounted command system
Unmanned aerial vehicle forest fire-fighting command vehicle and command control system
Electric unmanned aerial vehicle police command vehicle
Building pile foundation bearing capacity detection device