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Multi-rotor-type droun with a fixed wing
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The drone
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The drone with the landing device in the motor shaft
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The electric fixing device
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The multi-rotor type folding drone
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The fixing device
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The life-saving apparatus using drones
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The rotor arm device of multi-rotor type drone
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The camera equipment fixing device
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Rotating pressurized wastewater treatment plant
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Automatic thermal spraying device plate
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