cleaning preparations for industrial purposes, namely chemicals for the cleaning, maintenance and preservation of technical installations, apparatus, devices, instruments, tools, machinery, landcraft, aircraft, watercraft and parts thereof; cleaning preparations, namely chemical agents for cleaning and/or preserving ovens, fireplaces, heating installations, ventilation installations and sanitary installations; cleaning preparations, namely chemical agents for cleaning smoke ducts such as chimneys and smoke stacks; cleaning preparations, namely, chemical agents for cleaning and/or preserving pumps, heating boilers, combustion installations, incinerators, and ducts for solid, liquid or gaseous media; soot, lime and boiler deposit removal preparations for heating boilers and combustion installations; rust, tar, wax and grease removal preparations; cleaning preparations for household and industrial purposes, namely for cleaning metal, ceramic, rubber, plastic, wood, glass lacquered and enamelled surfaces and/or objects; cleaning preparations for textile fabrics and knits, namely for the cleaning of awnings, pillows and carpets; cleaning preparations for stones, bricks, tiles, floor tiles, masonry, plastered surfaces and walls, ceilings and floors of rooms and buildings covered by paint or lacquer; skin soap