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	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">METALURGIA</topic></authority><related type="narrower"><topic>ALEACIONES</topic></related><related type="narrower"><topic>ALUMINOTERMIA</topic></related><related type="narrower"><topic>BIOTECNOLOGIA DE MINERALES</topic></related><related type="narrower"><topic>CEMENTACION (METALURGIA)</topic></related><related type="narrower"><topic>CIANURACION</topic></related><related type="narrower"><topic>ELECTROMETALURGIA</topic></related><related type="narrower"><topic>FUSION FRACCIONAL</topic></related><related type="narrower"><topic>HIDROMETALURGIA</topic></related><related type="narrower"><topic>INGENIERIA QUIMICA</topic></related><related type="narrower"><topic>MATERIALES REFRACTARIOS</topic></related><related type="narrower"><topic>METALES A ALTAS TEMPERATURAS</topic></related><related type="narrower"><topic>QUIMICA TECNICA</topic></related><related type="narrower"><topic>TRATAMIENTO TERMICO DE LOS METALES</topic></related><related type="broader"><topic>METALES</topic></related><related type="broader"><topic>INGENIERIA QUIMICA</topic></related><related type="broader"><topic>INDUSTRIA SIDERURGICA</topic></related><related type="broader"><topic>MINAS</topic></related></mads>