screw oil expeller machine 1.easy to operate and maintain 2.low energy consumption 3.wooden box packaging 4.ISO approved peanut screw oil expeller"Dingsheng"brand oil press is composed of such components as electric control,hot pressing,adjustment,driving and vaccum oil filter.The squeezing bolt is made of alloy steel treated by carburozation to improve its suface hardness and wear resistance,the ...