Muhupenyu hwedu hwezuva nezuva, tichashandisa zvinhu zvakawanda zvesimbi.Zvigadzirwa zvesimbi zvakawanda zvinogadzirwa.Pepa jena remhangura isimbi yemhangura ine nickel seyo main alloy uye isina chinhu.Zvichienderana nemhangura-nickel alloys, cupronickel tsvimbo ine yechitatu zvinhu zvakaita sezingi, manganese, aluminium, nezvimwe zvinowedzerwa, ...
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