Bayan da aka fara aiki da masana'antar kula da najasa a hukumance, farashin maganin najasa yana da wahala sosai, wanda ya hada da tsadar wutar lantarki, raguwar tsadar kayayyaki da amortization, farashin aiki, farashin gyara da gyarawa, slud...
Kara karantawa