Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
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F23C
METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN; A CARRIER GAS OR; AIR
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9/00
Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
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F23C9/06
for completing combustion
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