... husks, metals, glass, etc. B,Crushing the oil seeds with the use of stone grinders and other ... mills. C,Oil expelling is a mechanical method that is ... extract oil from oil seeds like Sunflower seeds, Safflower seeds, Groundnuts, Soybeans, Rape seeds, Mustard seeds, Castor seeds, ... Copra, Cotton seeds, and many more.D,The oil seeds have to be ...