A na-eme ya nke H13 na-ekpo ?k? na-anw? anw? ma ? b? 38CrMoAl na ihe nd? ?z? na-ekpo ?k? na-ekpo ?k? b? nitriding ma ? b? nitriding nd? nwere ?t?t? af? nke ah?mah? ?r? Haziri ma mep?ta ewep?gh? na-eji a machining center n'?z? zuru ezu na-akpaka nhazi, na edo edo na-egwuputa ihe, kpamkpam n'?z? ziri ezi nke oghere mgbidi roughness.