1.piercing punch,for air conditioner die 2.die components 3.process according to ... Applied in automobile die, precision plastic mould,punch die, air conditioning fin die, semi-conduct encapsulation mouldProcessing materials Copper, ... andTesting EquipmentsCenterless grinder, surface grinder,internal grinder, cylindrical grinder, Inner-aperture grinder, CNC grinding machine,CNC milling machine, polishing ...