28.21 - Manufacture of ovens, furnaces and furnace burners
28.21.11 - Furnace burners; mechanical stokers and grates; mechanical ash dischargers and the like
28.21.12 - Industrial or laboratory furnaces and ovens, non-electric, including incinerators, but excluding bakery ovens
28.21.13 - Industrial or laboratory electric furnaces and ovens; induction or dielectric heating equipment
28.21.14 - Parts of furnace burners, furnaces and ovens
Manufacture of ovens, furnaces and furnace burners
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