Abstract:Today's technological progress has allowed the use of intelligent devices and machines al-most everywhere. The refrigerator is considered one of the most important appliances, which is used almost everywhere for the purpose of storing food, beverages, and medicines at low temperatures and in a closed place to avoid exposure.There is such a problem as the lack of cashless vending machines, the unavailability of information about the location of vending machines, etc. As a solution to the above prob… Show more
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