A na-ejikarị ya eme ihe na injection - ihe ndị na-emepụta ihe, karịsịa kwesịrị ekwesị maka mmepụta na nhazi nke ngwaahịa ndị nwere nnukwu gloss chọrọ, ma tinye ya n'ime ihe ndị dị n'ime ya na casings nke ngwa ụlọ (dị ka ikuku - mkpuchi mkpuchi), ihe ndị dị n'ime ya na casings nke ngwá electronic n'ji, yana ihe egwuregwu ụmụaka.
