LIMPIEZA, SUMINISTRO Y APLICACIÓN DE PROTECCIÓN ANTICORROSIVA A TUBERÍAS, EQUIPOS DE PROCESO, ESTRUCTURAS METÁLICAS Y PINTURA VINÍLICA A ESTRUCTURAS DE CONCRETO, Y COLOCACIÓN DE AISLAMIENTO TERMICO A TUBERÍAS Y CAMBIADORES DE CALOR, DE LA UNIDAD 600 PLANTA HIDROS No. 1, DE LA REFINERÍA ING. HECTOR R. LARA SOSA

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