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B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21B—ROLLING OF METAL
B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21B39/20—Revolving, turning-over, or like manipulation of work, e.g. revolving in trio stands
B21B39/28—Revolving, turning-over, or like manipulation of work, e.g. revolving in trio stands by means of guide members shaped to revolve the work during its passage
Dispositif de commande du deplacement d'un element, notamment d'un siege ou des parties d'un siege d'un vehicule automobile, par rapport a un bati