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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
B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
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FR725430D1930-11-071931-10-29
Method of pressing metal parts, for example metal cylinders
ExpiredFR725430A
(en)