Ht pombi ine midziyo yemazuva ano ine hunyanzvi uye hunyanzvi zvikwata. Isu tinoshandisa zvakakodzera zvishandiso zvepamberi uye tevera zvakanyatsotevera maitiro anotsanangurwa anogadzira maitiro. Iyi yegiredhi-giredhi zvinyorwa zvinosanganisira Manganese, kabhoni, silishon, phosphoron, sarufa, chromium, nickel, molybdenum mariri.