Repair and maintenance of steam or other vapour generators and auxiliary plant for use with steam generators such as condensers, economizers, superheaters, steam collectors and accumulators
Manufacture of tableware,kitchenware and other houshold articles and toilet articles of plastic, including manufacture of vacuum flasks and other vacuum vessels
Manufacture of cleaning and polishing products (preparations for perfuming or deodorizing rooms; artificial waxes and prepared waxes; polishes and creams for leather, wood, glass, metal etc.; scouring pastes and powders, including paper, wadding etc. coated or covered with these)