THE GEORGE A. MITCHELL COMPANY HAS PROCESSED SPECIAL COPPER BILLET PREPARATION EQUIPMENT REQUIRED FOR COPPER EXTRUSION. THESE MACHINES INCLUDE BILLET SCALPING AND BILLET PIERCING UNITS. A BILLET PIERCING UNIT PUNCHES A ROUND HOLE INTO THE CENTER OF THE BILLET AT BOTH ENDS SIMULTANEOUSLY, WHICH IS NEEDED FOR EXTRUSION PRESSES THAT CANNOT PUNCH A HOLE IN THE CENTER BILLET DURING THE EXTRUSION OPERATION.
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