έλεγχος ποιότητας, ποιότητα, μεγεθυντικός φακός, έλεγχος, στοιχείο ελέγχου, πιστοποίηση, επιθεώρηση, ανασκόπηση, σύμβολο, καλύτερος, δείγμα
Public Domain
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