7
Machines for the recovery of metals, in particular precious metals; Machines for refining metals, in particular for refining precious metals; Filtering installations; Filters being parts of machines; Filter housings being parts of machines; Filtering machines used in sewage handling; Filtering machines, separators and centrifuges; Filter presses for chemical processing; Microfiltration systems; Recycling machines for industrial and electrical scrap, for metal-containing liquids; Machines for treating surfaces; Machines and installations for the electrolysis of precious metals; Grinding mills [for chemical processing]; Mills [machines]; Ball mills; Powder handling apparatus [machines]; Pulping machines; Mix masters; Catalytic converters; Exhaust gas purifiers for industrial installations, flue gas scrubbers
11
Installations for the treatment of liquids, In particular water conditioning by the osmosis method; Machines for treating liquids using ion exchangers; Ion exchange installations; Ionic water generators; Electric furnaces; Electric furnaces [for industrial purposes]; Incinerators; Electric furnaces for metallurgical purposes; Electric heat-treating furnaces, Filters for waste gas purification; Heat exchangers for the removal of exhaust gases
40
Recovery of precious metals; Reclamation of solids from aqueous media by chemical precipitation; Reclamation of material from waste; Treatment [reclamation] of industrial waste; Treatment [reclamation] of material from waste; Filtration of liquids; Recycling services; Recycling services; Waste management services [recycling]; Recycling of valuable materials; Recycling of scrap; Recycling of chemicals; Recycling of waste