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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Electricidad-Material y equipo</topic></authority><related type="narrower"><topic>Condensadores eléctricos</topic></related><related type="narrower"><topic>Convertidores eléctricos</topic></related><related type="narrower"><topic>Rectificadores de corriente</topic></related><related type="narrower"><topic>Resistencias eléctricas</topic></related><related type="narrower"><topic>Transductores</topic></related><related type="narrower"><topic>Transformadores eléctricos</topic></related><related type="narrower"><topic>Conductores eléctricos</topic></related><related type="narrower"><topic>Aislantes eléctricos</topic></related><related type="narrower"><topic>Conmutadores eléctricos</topic></related><related type="narrower"><topic>Contadores eléctricos</topic></related><related type="narrower"><topic>Interruptores eléctricos</topic></related></mads>