Sinomeasure open channel flow metres le ultrasonic level meters li sebelisoa setsing sa ho hloekisa likhoerekhoere Motse oa Leshan, Profinseng ea Sichuan, tseo kaofela li sebelisang theknoloji ea AAO(Anaerobic Anoxic Oxic).
Ts'ebetso ea Anaerobic/Anoxic/Oxic (A/A/O) e sebelisoa haholo limeleng tsa masepala tse hloekisang metsi a litšila, tse amang tšebetso e ntle ea ho ntša limatlafatsi.
