Nkọwa Dị Mkpirikpi:

Ihe mkpuchi maka transformers e mikpuru mmanụ:
1) Akụkụ osisi, mkpanaka na igwe eji arụ ọrụ
2) Ntugharị osisi na ihe mkpuchi ihe
3) Kaadị corrugated, eriri clack ma ọ bụ ọwa mmanụ jụrụ oyi
4) eriri ákwà ọcha nke onye ọkụ eletrik, eriri iko e-glass, eriri nkwekọrịta
5) Akwụkwọ ntụpọ diamond, akwụkwọ e tinyere tupu e tinye ya n'ime akpa, akwụkwọ eriri
6) Tube akwụkwọ phenolic, tube akwụkwọ na tube akwụkwọ crepe
7) Mkpara phenolic ọkpụkpụ amorphous na mkpụrụ