Construcciýn de sistema de alcantarillado consistente en: el suministro e instalaciýn de 24,212.50 m.l. de tuberýa de 20 cms y 3,205.50 m.l. de tuberýa de 30 cms de P.V.C. serie 20 con junta hermýtica, ademýs de 201 pozos de visita tipo comýn y 382 descargas domiciliarias en la localidad Constituciýn, mpio. de Buenaventura en el Estado de Chihuahua

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