Anyị na-eji ngwá ọrụ nyocha dị elu dị ka Brown & Sharpe igwe na-ahụ maka nhazi atọ, Colin Begg P100 / P65 / P26 nha center, German Marl cylindricity ngwá ọrụ, Japan roughness tester, Optical Profiler, projector, ogologo nha igwe wdg iji jide n'aka na nyocha ikpeazụ n'ụzọ ziri ezi na kpamkpam.