1. Ọrụ dị mfe.Ndị ọrụ ọ bụla nwere ike iji igwe a rụọ ọrụ naanị site na ịdabere na obere oge
2 .Elu-arụmọrụ.Na obere oriri nke ihe onwunwe, ọ bụla brik nwere ike ime na 30-40s, nke ga-eme ka a ngwa ngwa mmepụta na ezi mma.
3. Mgbanwe.WD2-40 nwere obere ahụ, yabụ na ọ nwere ike kpuchie mpaghara ala. Ọzọkwa, enwere ike ibugharị ya n'otu ebe gaa ebe ọzọ n'ụzọ dị mfe.