What does 600 guide rail lathe mean?

The 600 guide rail lathe is a CNC pipe thread lathe

This series of CNC pipe thread lathes are mainly used to process the internal and external threads of pipe workpieces. They also have the functions of ordinary CNC lathes and can machine shafts. and discs and other workpieces for processing outer circles, inner holes and end faces; this series of machine tools are widely used in the petroleum industry to process and repair workpieces such as drill pipes, joints, casings, etc., and can also be used in geological exploration, mineral mining, Chemical smelting, pipeline network construction, machinery manufacturing, shipbuilding and other industries