Nkọwa dị mkpirikpi:

Mgbe ịgafechara akpụ akpụ, enwere ike imeziwanye usoro igwe na akụrụngwa ya. Original nnukwu kristal na prismatic kristal ọka na-adị gịrịgịrị na evenly obere, wee hazie re-haziri na-eme ka a-liquation, looseness, ikuku afụ na ịtinye slag ga-enwe na ya Ọdịdị na-adị nso na ike nke na-mma plasticity na n'ibu onwunwe nke metal. Ma n'ibu ihe onwunwe nke nkedo ibe dị njọ karịa ndị ọzọ forging ibe nke otu ihe. E wezụga, forging nwere ike ijide n'aka na continuity nke metal eriri Ọdịdị na na-eriri Ọdịdị na elu udi otu, metal streamline zuru ezu na-ekwe nkwa ogologo ndụ oge na ezi n'ibu onwunwe. Usoro nke iji akpụ akpụ akpụ akpụ. oyi pịa, ọkụ na-ekpo ọkụ enweghị atụ n'ịme mpempe akwụkwọ.