Ifanele insimbi engayoni, izinsimbi ezingezona ayoni, izingxenye ezincane ze-IC, okokunamathela, izinsimbi ze-ply;ingilazi, izitsha zobumba, i-agate, amatshe ayigugu, izingxenye ezincane zepulasitiki njll.;ukuhlolwa kokuqina okufana nalokho ekujuleni kanye ne-trapezium yezendlalelo ze-carbonized futhi kucime izendlalelo eziqinile.