Water supply installations; water purification installations; water filtering apparatus; purification installations for waste material; purification installations for sewage; filters for drinking water; water purifying apparatus and machines; water softening apparatus; sewage treatment [purification] installations; water dispensers.

Lamps; oil lamps; solar furnaces; freezers; air filtering installations; heat accumulators; heating installations [water]; water purification installations; water filtering apparatus; filters for drinking water; water purifying apparatus and machines; water softening apparatus and installations; water dispenser; radiators, electric; gas lighters; polymerisation installations