Machines, machine tools and/or parts of machinery, for the use in and as parts of metal processing centers, namely, multi-spindle heads and crown turret heads, spindle heads as parts of crown turret heads, milling machines, multi-spindle heads for the use in and as parts of metal processing centers, spindles for multi-spindle heads and crown turrets, rotary unions for multi-spindle heads and crown turrets, lathes, spindle bodies for multi-spindle heads and crown turrets, components of clutche...