Lo matshini unokusetyenziselwa ukwahlulahlulahlula i-anyanisi ibe ngamabakala amabini ngobuqhetseba. Ezinjenge-oxiometer kuluhlu olukhulu lwe-30-100mmm, emva koko bakwazi ukwahlulahlula kwi-30-50mm, i-50-100mm.ingqokelela kwimikhombandlela emibini eyahlukeneyo, emva koko inokwenzeka ukuba ilandele i-anyanisi elandelayo kunye nokusika ingcambu, njl