Bar code namely the abbreviation of form code, be differ by a group of width, reflectivity is different and empty, by certain encode combination rises, in order to shows the sign of a group of data. The bar code itself of commodity does not have the capacity that prevents bogus, it just is a kind of code of commodity, design to the active management of commodity. But if we can technology of sound use bar code, the bag chooses the chooses bar code carrier with a reasonable draw together reasonably, of reasonable choice bar code presswork method, of the code presswork the position, with respect to the effect that can have to prevent bogus.

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