F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F27
FURNACES; KILNS; OVENS; RETORTS
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F27B
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
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F27B3/00
Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
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F27B3/10
Details, accessories, or equipment peculiar to hearth-type furnaces
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