To collect samples from the market. At least once a year, is made from a variety of markets and stores at least 2 generations.Produced by one of the production version will be produced, and not less than 6 months and the other production versions will be produced, and not less than 2 years. Since the days of storing samples for examples of other manufacturers that more tests to compare the results. Stores at least once a year, and the number or quantity of the samples is stored depends on the suitability or?Depending on the existing products in the market.
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