Mayunitsi a DPC & DPV Meterndi mafuta ophatikizika a cyclic systems. Kapangidwe kalikonse ka dongosolo lopaka kumayendetsedwa ndi mita. Phukusi lomwe limakhala ndi mafuta odziwika bwino ku ma network ogawidwa ndi matenthedwe amataya mafuta ophatikizika ndi malo otumphukira.
