Wax tshav kub hloov barcode tshuab luam ntawv ribbon, ua los ntawm cov khoom zoo, qhov siv quav ciab puag ribbon no yuav xyuas kom meej tias koj cov ntawv luam barcodes thiab cov ntawv tseem ceeb tau ntev. Nws lav zoo ib yam thiab txhim khu kev luam ntawv kev ua tau zoo txawm tias nyob rau hauv ib puag ncig hnyav thiab nyuaj.