... chest4.oil drip on the oil pan from the squeezing bolt5.then oil inflow the vacuum oil filter ... oil crops, such as sesame, peanut, soybean, black seed, sunflower seed, flax, vegetable seed, castor seed, cotton seed, rape seed, camellia ... seed, walnut, etc. by third levels for one time.3.pure oil quality:the vacuum oil ... residue so as to ensure the pure oil quality and meet the standard of health ...