Measuring complicated curve surface have been a hot spot in developedcountries for long time. Many states have invested much manpower, materialresources in the field and have obtained breakthrough. My tutor ProfessorSong Yuquan proposed design scheme of measuring instrument fornon-sphere surface in 1996 and gained practical new-style patent. Its basicprinciple formulae were listed as following:
In practical engineering application he also brought forward alterablewidth measurement of chord height ...