Disc-Centrifuges (1 Solids-retaining Nozzle with pressurized Nozzle with peripheral centrifuge discharge of concentrate nozzles Periodically Periodically solids-ejecting sollds-ejecting centrifuge with centrifuge axial channe IsDisc-Centrifuges Solids-retaining centrifuge Nozzle with pressurized discharge of concentrate Nozzle with peripheral nozzles Periodically solids-ejecting centrifuge Periodically solids-ejecting centrifuge with axial channels