11
Heating elements; heating elements made of mild steel and sold as an integral component of regenerative heaters; coatings sold as an integral component of heating elements; heating installations and apparatus for heating, namely, regenerative air and gas heater elements for use in regenerative heat exchangers, heat transfer elements for rotary heat exchangers for industrial use; regenerative air and gas heater elements; air pre-heater elements and gas re-heater elements; parts and fittings for all the aforesaid goods
37
Maintenance, installation, repair, upgrading, retrofit and refurbishment of industrial plants and machinery; maintenance, upgrade, retrofit, repair and upgrading of heating and environmental control apparatus and installations, heat regenerators, air re-heaters, pre-heaters, heat exchangers, gearboxes and parts and fittings including heat transfer elements for all of the aforesaid; information, advisory and consultancy services relating to all of the aforesaid services
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