Acquisition Of Ductile Cast Iron (Hfd) Accessories, For The Work Complementary Works And Extension Of The Work: Construction Of The Drinking Water And Sewer System Of The C.P. La Esperanza And Annexes ¿ Amarilis ¿ Huánuco, Province Of Huánco - Acquisition Of Ductile Cast Iron (Hfd) Accessories, For The Work ¿Complementary Works And Extension Of The Work: Construction Of The Drinking Water And Sewer System Of The C.P. Hope And Annexes ¿ Amarilis ¿ Huánuco, Province Of Huánuco - Huánuco