Gupfa gupfa ni uburyo bwo guterera ibyuma aho icyuma gishongeshejwe, mubisanzwe kivanze kitari ferrous nka aluminium, zinc, cyangwa magnesium, gaterwa kumuvuduko mwinshi mubyuma byongera gukoreshwa, byitwa gupfa.Urupfu rwashizweho kugirango rukore ishusho yifuza yibicuruzwa byanyuma ....
Soma byinshi