Indawo yokugcina ioyile okanye indawo yokungena iqhagamshela i-injector kwinkqubo yokuthambisa ephakathi, inika ioyile yokuthambisa ecocekileyo ngoxinzelelo olulawulwayo.
Iyunithi yokulinganisa ilawula ngokuchanekileyo ubungakanani beoyile ehanjiswayo ngomjikelo ngamnye okanye ngomjikelo ngamnye womatshini, iqinisekisa ukuthambisa okuzinzileyo kunye nokusetyenziswa kweoyile okuncinci.