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mads.xsd"><authority><topic authority="http://general-terms.thesaurus.ekt.gr/vocab">υλικά</topic></authority><related type="narrower"><topic>δομικά υλικά</topic></related><related type="narrower"><topic>εκρηκτικές ύλες</topic></related><related type="narrower"><topic>έξυπνα υλικά</topic></related><related type="narrower"><topic>ίνες</topic></related><related type="narrower"><topic>καύσιμα</topic></related><related type="narrower"><topic>κεραμικά υλικά</topic></related><related type="narrower"><topic>κεριά</topic></related><related type="narrower"><topic>κράματα</topic></related><related type="narrower"><topic>λιπαντικά</topic></related><related type="narrower"><topic>μέταλλα</topic></related><related type="narrower"><topic>πλαστικά</topic></related><related type="narrower"><topic>συγκολλητικά</topic></related><related type="narrower"><topic>σύνθετα υλικά</topic></related><related type="narrower"><topic>χημικά προϊόντα</topic></related><related type="other"><topic>αντοχή υλικών</topic></related><related type="other"><topic>επιστήμη υλικών</topic></related></mads>