Mpekere bọọdụ dị n'ákwà a kpara akpa nke sitere na polyamide emegharịrị. Na-egosipụta mgbanaka, úkwù ndọta, akpa n'akụkụ na akpa azụ nwere nko na eriri akaghị. Ntuchi mkpụmkpụ mkpụmkpụ.