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B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D28/00—Shaping by press-cutting; Perforating
B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
B21D28/14—Dies
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FR1200228D1958-02-281958-02-28
Process for the economical manufacture of cutting tools, and the tools produced according to this process
ExpiredFR1200228A
(en)
Process for the manufacture of bicyclic compounds, in particular of 2-alkoxy-alkyl-bicyclo- (1,2,2) -heptene- (5) or of 2,3-bisalkoxyalkyl-bicyclo- (1,2,2) -heptene- (5)