Ihe na-egbochi ire ọkụ
nkwa nchekwa
Igwe anaghị agba nchara na-egbochi corrosion na uzuzu
Bọtịnụ PC agbakwunyere
mgbanaka mkpuchi silicone
Ọrụ dị elu, siri ike na ntụkwasị obi
Enwere ike iji ngwaahịa a na njem ụgbọ njem, ngwa ụlọ, ngwa ahụike, ngwa eletrọnịkị, ụlọ ịsa ahụ, njikwa ohere, wdg.