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Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
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F23B
METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
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5/00
Combustion apparatus with arrangements for burning uncombusted material from primary combustion
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F23B5/04
in separate combustion chamber; on separate grate
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