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	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">INDUSTRIA PETROLERA</topic></authority><related type="narrower"><topic>Equipos y accesorios (Industria petrolera)</topic></related><related type="narrower"><topic>ESTACIONES DE SERVICIO</topic></related><related type="narrower"><topic>INDUSTRIA DE ESQUISTOS PETROLIFEROS</topic></related><related type="narrower"><topic>INSPECCION DEL PETROLEO</topic></related><related type="narrower"><topic>PETROQUIMICOS</topic></related><related type="narrower"><topic>REFINACION DEL PETROLEO</topic></related><related type="narrower"><topic>TRABAJADORES PETROLEROS</topic></related><related type="broader"><topic>INDUSTRIAS PETROQUIMICAS</topic></related><related type="broader"><topic>INDUSTRIAS OLEAGINOSAS</topic></related><related type="broader"><topic>INGENIERIA DEL PETROLEO</topic></related><variant type="other"><topic>Industria del petróleo</topic></variant><variant type="other"><topic>Petróleo--Industria y comercio</topic></variant></mads>