Ka ho hahamalla ka pele ho mekhoa e tloaelehileng ea indasteri, re ikitlaelletsa ho hlahisa lisekoere tsa boleng bo holimo tsa granite tse triangular.U sebelisa granite e ntšo ea Jinan e ntle ka ho fetesisa joalo ka thepa e tala, lisekoere tse nepahetseng tsa granite tse khutlo-tharo li sebelisoa ka nepo ho lekola likhokahano tse tharo (e leng X, Y le Z axis) tsa data ea spectrum ea likarolo tse entsoeng ka mochini.Mosebetsi oa Granite Tri Square Ruler o tšoana le Granite Square Ruler.E ka thusa sesebelisoa sa mochini le mosebelisi oa moetsi oa mochini ho etsa tlhahlobo ea angle e nepahetseng le ho ngola likarolo / lisebelisoa tsa mosebetsi le ho lekanya perpendicular ea likarolo.