Okwu ndị ahịa

Ihe nleba anya ọkpọ ike n'ịntanetị akpaaka

ikpe

Aerospace engine pipe hardness oru ngo n'ịntanetị na-eji ihe nnwale ike ike Rockwell akpaka anyị.

Ụlọ nyocha ndị ahịa Mexico

Ihe nleba anya siri ike nke Rockwell, onye nyocha ike ike Brinell, onye nnwale ike ike Vickers