→ BK-VT ụdị vibration iche n'elu ikpo okwu bụ tumadi esịnede igwe anaghị agba nchara table na vibration ikewa usoro, vibration ikewa usoro gụnyere ụkwụ, ikuku mounts, ịgba ngwaọrụ, eluigwe na ala ukpụhọde ụkwụ.
→ Main Ngwa: ngwa nnwale ngwa anya, mita roughness elu, contourgraph, microscope, ngwa nnwale eletrọnịkị na ngwa ndị ọzọ ziri ezi.