… Centrifuges, including centrifugal dryers; filtering or purifying machinery and …
Explanatory notes
… apparatus for liquids or gases, other than , e.g., filter funnels, milk strainers, strainers for filtering paints … (e.g., coal dust, metallic particles, etc., recovered from furnace flue gases), or to eliminate harmful materials … dust extraction, removal of tar, etc., from gases or smoke fumes, removal of oil from steam engine vapours). …