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B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
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FR1004314D1947-04-041947-04-04Barres d'acier d'armatures pour béton armé et leur procédé de traitement
ExpiredFR1004314A
(fr)
Poutres pour coffrages métalliques destinés aux constructions en béton armé et en béton et hourdis et procédé de coffrage à l'aide de tels éléments