40 Treatment of materials, namely surface treatment of metals, in particular aluminium, for protection against corrosion, in particular for gears.
7 Gears and gear motors (except for land vehicles), and parts therefor, in particular housings.
2 Surface coatings, in particular for gears, gear cases, gear motors and parts for the aforesaid goods, paints, lacquers, anti-corrosive compositions, in particular based on aluminium oxide.