... Briquette machine: 1, raw materials: coal, charcoal, carbon powder; 2, shape of final product: round, oval, square, pillow; coal/charcoal./carbon powder/briquette machine OEM ... other mineral powder or metal ore powder to be round, square, pollow or oval.Make them easy to be delivery ... are mainly used to be briquette presses, such as various shape, Please check the picture. final product of ball press ...