Ibhalansi esebenzayo ingabona ukudluliswa kwamandla kwamaseli aseduze, ifinyelele umkhawulo wamanje wokulinganisa oqhubekayo ongu-4A.Ubuchwepheshe bokulinganisa obusebenzayo obusezingeni eliphezulu bungaqinisekisa ukuvumelana kwebhethri ngezinga elikhulu, kuthuthukise imayela lebhethri, futhi kubambezele ukuguga kwebhethri.
![iqna1](http://www.cnshenergy.com/uploads/iqnaha1.jpg)