37 Floor polishing; floor sanding; cleaning of carpet, tile, grout, Mexican tile, terra cotta, marble, travertine, terrazzo, vinyl, natural stone and hardwood; restoration in the field of Mexican tile, terra cotta, marble, travertine, terrazzo, natural stone, vinyl and hardwood; maintenance and/or repair of carpet, tile, grout, Mexican tile, terra cotta, marble, travertine, natural stone, terrazzo, vinyl and hardwood