![BarCode Allthepacketsyoubuyinasupermarketcarryabarcod...]( "BarCode Allthepacketsyoubuyinasupermarketcarryabarcod...")
- 問題詳情：BarCode Allthepacketsyoubuyinasupermarketcarryabarcode．Thiscodeisscanned（掃描）bylaserlightandthebrandandproductnamesaregiventothecustomerwiththeprice．Thepeoplerunningthestorecankeepacontinuouscheckofhowmanypacketsofeachproductandofsizeareont...
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