The pretreatment contention is the raw material, and here is to remove the odor of the refined oil. The deodorization is physical deodorization by distillation without any reagents;
Pre-treatment is the raw material, and here is to remove the smell of refined oil, deodorization is the use of distillation physical deodorization, do not need any reagents;
Pretreatment is the raw materials, and here is to remove the smell of product oil. Deodorization is physical deodorization by distillation, without any reagent;