A monitoring system having a stylus mounted to a support that controllably moves the stylus along a travel path as it contacts an object of interest. The object is supported by a rotating turntable and held in place by a manually actuatable retainer that exerts a repeatable downward force on the object....http://www.google.com.tw/patents/US5505003?utm_source=gb-gplus-share專利 US5505003 - Generative measuring system
