Malunga nokukhetha imibhobho yamanzi egungxulwayoimxinwa-engqindilili yefeni yemilomo yefeni) okanye (Imilomo yefeni ethe tyaba). Olu hlobo lombhobho lusetyenziswa kakhulu kwishishini lokucoca. Olu hlobo lwemilomo luphawulwa ngokukwazi ukuvelisa umphezulu wokutshiza. Ngenxa yeempawu zayo ezizodwa, kwenziwa i-jet enamandla.

Ukusuka kwithiyori yoyilo yombhobho, phantsi kokuhamba kunye noxinzelelo olufanayo, incinci ikona yokutshiza, kokukhona amandla eempembelelo ayenzileyo. Ngokubanzi, kumabala ekunzima ukuwacoca, sicebisa umlomo wombhobho weflethi onekona elincinci lokutshiza. Olu luhlu lwemibhobho yokugungxula lunokuvelisa ifuthe elinamandla nelinamandla, elinokususa ngokulula amabala okanye izinto zangaphandle kumphezulu wento. Cebisa umbhobho ofanelekileyo kuwe.