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Publication of CH352545ApublicationCriticalpatent/CH352545A/fr
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
B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
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Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
CH352545D1958-02-031958-12-10Machine pour obtenir des tubes enroulés en hélice
CH352545A
(fr)