Igwe na-emepụta ihe nchekwa nchekwa bụ ahịrị mmepụta akpaka zuru oke, nke nwere ike ime akwa akwa na oke ọkpụrụkpụ nke 3mm.
Igwe na-emepụta ogbe nchekwa nwere oke nhazi dị elu nwere ike ịhazigharị webụ ahụ ozugbo. Na-arụ ọrụ nke ọma ma nwee ike ịmepụta ngwaahịa ndị ọzọ.
Nwee ọtụtụ atụmatụ pụrụ iche iji hụ na ntụpọ punching ziri ezi na ogologo nke rack
Ihe eji eme ihe bụ Cr12 nwere ogo dị elu yana ogologo ndụ ọrụ.