Nkọwa nkenke:

Ngwongwo ígwè kwesịrị ekwesị maka mgbidi ụlọ na mgbidi nke usoro nhazi ígwè. Straightening n'ozuzu na-ezo aka nchara nchara nke jikọtara nchara nchara, ya bụ nchara nchara, iji mee ka nkwụsi ike nke purlins ma mee ka purlins ghara ịdị na-adighi ike na mmebi n'okpuru ụfọdụ ikike ndị ọzọ. Enwere nkwado (dịka ogo iri anọ na ise na-agbatị na eriri) yana ihe nkwado zuru oke (yabụ ihe niile kwụ ọtọ). Mgbe ọgwụgwọ gas na-ekpo ọkụ, a na-enweta mmetụta antirust.