Ahịhịa ọlana-arụ ọrụ kacha mma n'ọnọdụ ndị a:
Mpaghara ibu dị elu: Kwesịrị ekwesị maka akụkụ igwe arụrụ arụ na-ebu ibu ma ọ bụ mmetụta.
Yiri nguzogide chọrọ: N'ime ngwa nwere oke iyi, ọla kọpa nwere ike inye ezigbo mgbochi iyi.
Ngwongwo mmanye onwe onye: N'ebe ndị nwere ọnọdụ mmanye na-adịghị mma, ihe na-eme onwe ya nke osisi bronze dị mkpa karịsịa.
Nguzogide corrosion: Kwesịrị ekwesị maka gburugburu ebe nwere iru mmiri ma ọ bụ mgbasa ozi na-emebi emebi, nguzogide corrosion nke ọla nwere ike ịgbatị ndụ ọrụ nke ọma.
N'iburu n'uche ihe ndị a niile, osisi ọla kọpa na-arụ ọrụ nke ọma na ụlọ ọrụ dịka igwe, ụgbọ ala, na ngwuputa ihe.
