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B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
B27J5/00—Mechanical working of cork
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FR791441D1935-06-191935-06-19
Further development in the manufacture of cork discs used in metal caps for capping bottles or other containers
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