... stone grinders and other mills. C,Oil expelling is a mechanical method that is used to extract oil from oil seeds like Sunflower seeds, Safflower ... , Castor seeds, Copra, Cotton seeds, and many more.D,The oil seeds have to be crushed or squeezed under a high ... pressure in one step. E,Oil is extracted through the use of such machines is organic and 100% free of all ...