7
Agitators for circulating liquid media; Mixers [machines]; Shredders [machines]; Shredders [machines] for industrial use
11
Septic tanks; Heat generating apparatus; Waste water treatment tanks; Bioreactors for use in the treatment of wastewater; Toilets [water-closets]; Lavatory installations; Kilns; Wood burning stoves; Barbecues; Cookers incorporating grills; Solar thermal collectors [heating]; Solar energy powered heating installations; Solar water heaters; Sunlight collecting apparatus for heating purposes; Solar furnaces; Heat accumulators; Heat pumps; Heat regenerators; Thermal storage instruments [solar energy] for heating; Storage heaters; Heat exchangers, other than parts of machines
20
Containers, not of metal, for liquid fuel; Reservoirs, not of metal nor of masonry; Containers made of synthetic material [other than for household or kitchen use]; Containers (non-metallic -) for storage purposes [other than household or kitchen use]; Containers (non-metallic -) for liquids [other than for household or kitchen use]; Non-metallic containers [other than for household or kitchen use]; Containers, and closures and holders therefor, non-metallic; Composite caps for containers [non-metallic and not for household or kitchen use]; Container closures of plastic; Liquid storage tanks [containers] made of non-metallic materials; Spears [valves], not of metal for use with containers; Slide closures (Non-metallic -) for containers; Bins designed to facilitate accelerated breakdown of organic matter [non-metallic]; Water tanks (Non-metallic -) [containers]