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Extindere UPC-A la EAN-13 activare
Extindere UPC-A la EAN-13 dezactivare
Conversie EAN-13 la ISBN activare
Conversie EAN-13 la ISBN dezactivare
UPC-A ID caracter 'b'
UPC-A ID caracter 'z'
UPC-E ID caracter 'c'
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