Anyị kwadebere ngwa nyocha zuru oke maka ụdị gia cylindrical dị ka hexagon, Zeiss 0.9mm, Kinberg CMM, Klingberg CMM, Klingberg P100/p65/p26 Ebe a na-atụle GEAR, Gleason 1500GMM, mita roughness nke Germany Marr, Profiler Roughness Mita, Projector, Ngwa Ịha Ogologo wdg., Klingberg