Singumvelisi wemibhobho yemixube epheleleyo. Kuba singumvelisi, sinamandla okuphuhlisa imveliso kunye namandla okuvelisa, kwaye sibalahlile abaphakathi. Iimpahla ozithenga kuthi ngamaxabiso ex-mveliso, ke ixabiso elisebenza ngayo liphezulu kakhulu. . Imfuneko yezobugcisa kwishishini elipheleleyo le-cone nozzle kukuba impazamo ye-engile yokutshiza phantsi koxinzelelo olinganiselweyo ayinakugqitha ± Kwi-5 degrees, impazamo yokuhamba koxinzelelo olulinganisiweyo alunakugqitha ± 5% yokuhamba okulinganisiweyo, kwaye icandelo lokutshiza kufuneka gcina isitshizi esifanayo.

Sineemfuno ezingqongqo kwiimfuno zobugcisa zeshishini. Impazamo ye-engile yeemveliso zethu phantsi koxinzelelo olulinganisiweyo ngokubanzi akukho ngaphezulu kweedigri ze-3, kwaye impazamo yokuhamba phantsi koxinzelelo olinganiselweyo ngokubanzi akukho ngaphezulu kwe-3%. Ngaphaya koko, icandelo lethu lokutshiza livavanywa ngokungqongqo ukuqinisekisa ukutshiza okufanayo.