Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/6826
Is Reference of Πολυκρυσταλλικό πυρίτιο-el#Sense
Polykrystallinsk silicium-da#Sense
Silicium polycristallin-fr#Sense
Polycrystalline silicon-en#Sense