Bikwiranye nicyuma cya fer, ibyuma bidafite ferrous, IC ibice bito, ibifuniko, ply-metals;ikirahure, ububumbyi, agate, amabuye y'agaciro, ibice bya pulasitike bito n'ibindi.;kwipimisha ubukana nkubwo kuri ubujyakuzimu na trapezium yibice bya karubone no kuzimya ibice bikomeye.
