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
B21C33/00—Feeding extrusion presses with metal to be extruded ; Loading the dummy block
B21C33/02—Feeding extrusion presses with metal to be extruded ; Loading the dummy block the metal being in liquid form
B—PERFORMING OPERATIONS; TRANSPORTING
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
B21C23/00—Extruding metal; Impact extrusion
B21C23/21—Presses specially adapted for extruding metal
Procede et dispositif pour la protection de substances perissables contenues dans des recipients contre l'influence de gaz nocifs, par exemple l'air de l'atmosphere
Procédé pour extraire de la matière à l'état visqueux d'un fût de transport, et dispositif permettant notamment la mise en Óoeuvre de ce procédé.