The invention relates to a robot (100) for maintaining a surface, characterized in that it comprises: - an aircraft (110) designed to move close to the surface; - a base station (120) designed to remain on the ground; a sealed sheath (140) connecting the aircraft to the base station, the sealed sheath comprising: - a pipe for supplying the aircraft with fluid from the base station during a surface maintenance operation, and - a cable to supply the aircraft with energy.
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