FIELD: machine engineering, possibly deburring parts in electrochemical equipment. SUBSTANCE: apparatus includes buildup cathode-tool having hollow tube. First gear wheel is mounted on end portion of said tube. Second and third gear wheels are also mounted on tube; between second and third gear wheels ring of elastic material is mounted. Second gear wheel has metal surfaced portions shifted one relative to another by angle equal to 120 degrees. Dielectric plate is secured to treated part at side of its end. EFFECT: enlarged functional possibilities of apparatus providing treatment of inner surfaces. 1 dwg
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