Contracting For The Execution Of The Work: Improvement Of The Water Provision Service For Irrigation In The Challhua And Socos Sector Of The District Of Llamellin Of The Province Of Antonio Raymondi Of The Department Of Ancash. With Cui 26297 - Contracting For The Execution Of The Work: Improvement Of The Water Provision Service For Irrigation In The Challhua And Socos Sector Of The District Of Llamellin Of The Province Of Antonio Raymondi Of The Department Of Ancash. With Cui 2629709