1, tupu mmalite nkwadebe 1).N'ikwekọ na mgbapụta mmanụ griiz, ọ dịghị mkpa ịgbakwunye griiz tupu ịmalite;2).Tupu ịmalite, meghee valvụ mbata nke mgbapụta ahụ, mepee valvụ ikuku, na mgbapụta mmiri na pipeline mmiri ga-ejupụta na mmiri mmiri, wee mechie nkwụsị ahụ ...
GỤKWUO