Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
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F23J
REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
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2900/00
Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
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F23J2900/13004
Water draining devices associated with flues
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