ηλεκτρικό πυλώνα, γραμμή υψηλής τάσης, μεταφορά ενέργειας, ηλεκτρική ενέργεια, καλώδιο, παραγωγή καυσίμων και ηλεκτρικής ενέργειας, γραμμή ρεύματος, μπλε, παροχή ηλεκτρικού ρεύματος, βιομηχανία, ατσάλι
Public Domain
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