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Publication of GB1234111ApublicationCriticalpatent/GB1234111A/en
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C9/00—Cooling, heating or lubricating drawing material
Procedimiento para el intercambio entre un fluido a reca- lentar yno a vaporizar que circula en un recinto, y un agen-te liquido de recalentamiento de circulacion exterior.