... and press part.(1).Pretreatment Equipments which is pretreat the raw material include:shelling equipment, Separating equipment, Sieving ... Cooker ,oil press equipements. After getting the crude oil , using the clarifying tank to cleaning the oil residuals.* Advantages:Pre-treatment technology ... less than 1.5%;(3).Screening section, it can remove the the stone , shells , iron steel nails and some other ...