4.2.5-the regulation about the order of sampling-sampling in order to prevent the cross-contamination and facilitate cleaning the sampling instruments easily a. for powder material, taken in the following order:-Non-stick material, white, odorless, easy-flowing or crystals-White powder material, hard to identify flavors -white powder material, heavy odor -white powder materials, stick -powder material in color and not stick -raw materials and colored powder stick
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