Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (furnaces through which the charge is moved mechanically or in which the charge moves by gravity F27B9/00)

Child Classifications

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• F27B 5/02 of multiple-chamber type
• F27B 5/04 adapted for treating the charge in vacuum or special atmosphere
• F27B 5/06 Details, accessories or equipment specially adapted for furnaces of these types