Shot of technicians operating die casting machine, two men operating outer moulds, lining tubes up on table in foreground. Shot of billet being inserted into die carrier, ram pushing metal into extrusion press. Shot of furnace door opening, tray sliding out carrying metal billets. Shots of die casting machine in operation, hand removing casting after press has punched out die. HAMS of mould being lowered into place in centrifuge casting apparatus. CS of men carrying crucible of molten metal from smelter to centrifuge casting, molten metal being poured in pouring bowl, molten metal dropping through in centrifuge casting machine.