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CERAMIC HONEYCOMB STRUCTURE AND MANUFACTURE THEREOF AND ROTARY HEAT ACCUMULATION TYPE CERAMIC HEAT EXCHANGE BODY UTILIZING SAID STRUCTURE AND EXTRUSION MOLDING DIE FOR SAID HEAT EXCHANGE BODY
CERAMIC HONEYCOMB STRUCTURE AND MANUFACTURE THEREOF AND ROTARY HEAT ACCUMULATION TYPE CERAMIC HEAT EXCHANGE BODY UTILIZING SAID STRUCTURE AND EXTRUSION MOLDING DIE FOR SAID HEAT EXCHANGE BODY