... process more than 20 kinds of oil crops, such as, olive, palm, oil sunflower, cottonseeds, soybean, peanut, sesame, vegetable seeds, ... has oil pressing, oil extraction and oil refinery from various oil seeds such as cottonseed, rapeseed, high-oil sunflower seed, peanut kernel, soybean, ... oilseeds need to be softened like soybean or other hard oil plants.3. Break oil crops Third step of pretreatment, ...