anti wearing and corrosion screw completeMulti-stage injection control 10. speedsfilling pressures for each speed stageMulti-stage pressure control 10. pressureholding speed for each pressure stageMulti-stage screw recovery control. Three speeds three back pressuresNozzle end barrel R temperature group control devicecold screw starting preventionBarrel-heater coverautomatic purge (four modes)non-back pressure function in manual modesHopper based temperature controlsPurge guard with interlockInjection units drop prevention device (Electrical-mechanical)