... with reasonable techniques. 2.Operating principle: 1.When oil press is on work, material enters the extruding chamber from ... chamber, there is quite strong friction among press screw, chamber and the oil materials. 3.On the other hand, ... oil. 3.Characters: Simple design , easy to operate , wide suitability , continuous operation, high productivity and high oil product ratio. . 6YL-120 screw oil press ...