Uru nhazi:ịdabere na ọkachamara teknụzụ otu, anyị nwere ike hazie ngwaahịa dị iche iche mkpa nke ndị ahịa.Agba, udi, nha, okpomoku na iru mmiri nke gburugburu ngwa, wdg. Mgbe ị na-ebute ọnọdụ ihe achọrọ gị yana ihe achọrọ, anyị ga-edozi usoro ngwaahịa iji mezuo ihe ngwaahịa gị chọrọ.(ya na ihe · elu nseta ihuenyo).
Uru ọnụ ahịa:ụlọ ọrụ na-eji nnukwu igwekota roba nwere nnukwu akpaaka na mmepụta mmepụta ihe.Enwere ahịrị mmepụta rọba butyl iri na atọ, yana ihe a na-emepụta kwa ụbọchị nke tọn 60 yana ihe karịrị tọn 20000 kwa afọ.Enwere ahịrị mmepụta ihe mkpuchi 15, yana mpaghara mkpuchi butyl kwa afọ nke ihe karịrị nde square mita 30, ahịrị nrụpụta butyl nwere akụkụ abụọ nwere akụkụ abụọ, yana ihe nrụpụta kwa afọ nke ihe karịrị nde 8 nde butyl nrapado nwere akụkụ abụọ, yana otu n'apata. eriri mmepụta teepu, nke nwere ihe nrụpụta kwa afọ nke 3.6 nde mita.Ọnụ ọgụgụ mmepụta ihe na-ekpebi nnukwu akụrụngwa ndị a zụrụ n'otu ogbe, ya mere ọnụ ahịa ịzụrụ ihe anyị na ọnụ ahịa dị ntakịrị nke mmepụta dị ala karịa nke obere ụlọ ọrụ na obere obere.Ngwaahịa ndị kwekọrọ na ya nwere uru ọnụahịa siri ike.
Uru njikwa ogo:Anyị nwere ụlọ nyocha nyocha pụrụ iche wuru nke ọma, nke na-eduzi nyocha ọtụtụ ntụpọ n'otu ogbe nke ngwaahịa emechara, ma na-enyocha paramita dị ka ike tensile, njupụta, ntinye, ntinye agbaze, ọdịnaya ntụ ntụ, nnabata okpomọkụ, wdg, iji hụ na na paramita arụmọrụ ngwaahịa na usoro ngwakọta nke ime na-agbanwe agbanwe ma kwụsie ike.Ọ bụrụ na otu paramita dị iche na uru ọkọlọtọ nke ngwaahịa ahaziri ahazi, ngalaba mmepụta ga-edozi ozugbo usoro nke onye na-agwakọta igwe na-agwakọta roba ma na-eme nyocha nlele ugboro ugboro iji mezuo ụkpụrụ arụmọrụ nke onye ahịa chọrọ.