1. Nkwenye nchekwa, na-eji ihe na-egbochi ọkụ
2. mgbanaka mkpuchi silicone
3. bọtịnụ PC arụnyere, siri ike na ntụkwasị obi
Enwere ike iji ngwaahịa na njem, akụrụngwa nchekwa, akụrụngwa ụlọ, akụrụngwa ahụike, mmalite, ngwa elektrọnik, ụlọ ịsa ahụ, wdg.