Kenyelletso ea Sehlahisoa
Pompo ea seretse ea BW ke licylinder tse tharo tse tšekaletseng tse khutlisang pompo ea piston e sebetsang e le 'ngoe, pompo e nang le lisilindara tse peli le mefuta e mene ea lifaele. Moqomo o moholo o tšehetsang boro ea bophara ba limithara tse 1000. Moqomo o monyane o ts'ehetsang drill e nyane ea bophara ba limithara tse 1500. Haholo-holo e sebelisoang bakeng sa pompo ea seretse ea ho cheka seretse, e ka boela ea sebelisoa bakeng sa likarolo tse ling tsa merafo, drainage le phepelo ea metsi a sebaka se selelele le merero e meng.