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	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">ACERO ESTRUCTURAL</topic></authority><related type="narrower"><topic>ACERO PARA AVIONES</topic></related><related type="narrower"><topic>COLUMNAS METALICAS</topic></related><related type="narrower"><topic>CONSTRUCCIONES DE ACERO PRETENSADO</topic></related><related type="narrower"><topic>LAMINAS DE HIERRO Y ACERO</topic></related><related type="narrower"><topic>MIEMBROS ESTRUCTURALES REMACHADOS</topic></related><related type="other"><topic>CONSTRUCCIONES METALICAS</topic></related><related type="other"><topic>HIERRO ESTRUCTURAL</topic></related><related type="other"><topic>PUENTES METALICOS</topic></related><related type="broader"><topic>MATERIALES DE CONSTRUCCION</topic></related><related type="broader"><topic>INGENIERIA CIVIL</topic></related><related type="broader"><topic>VIGAS</topic></related><variant type="other"><topic>Acero de construcción</topic></variant></mads>