συγκόλλησης, κράνος κράνος, μάσκα συγκόλλησης, ΕΡΓΑΣΤΗΡΙ, βιομηχανία, μηχανολογία, εργασία, τεχνίτης, εξοπλισμός, τεχνολογία, μηχανήματα
Public Domain
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