Suministro e instalaciýn de tuberýa de P.V.C. serie 20 en el Sector Noreste para 771 m.l. de 18" de diýmetro, 182.50 m.l. de 10" de diýmetro de subcolectores y 1,716.30 m.l. de atarjeas de 8" de diýmetro

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