440C urupapuro rudafite ibyuma
440C karubone ndende, Icyuma cyo hejuru cya chromium martensitic ifite ibyuma bifite ubukana bwinshi kandi yambara imbaraga nyuma yo kuzimya, gukora ibikwiriye gukata ibikoresho, ibicuruzwa, ibibumbano, nibice byukuri.
reba byinshi