This paper proposes the use of the similarity theory to determine the technological conditions of grinding and other kinds of processing , can be extended to the original process of grinding of the internal spherical surfac , Univ, Russia.
Besides, Crystaltechno Ltd offers serial production of spherical lenses from glass , (hemispheres and hyper hemispheres), spherical plano-convex lenses and tub , became one of influential private optics manufacturing company in Russia , CNC controlled grinding and polishing facility for sapphire spherical dom.
engineering will contribute significantly to the progress of grinding and polishing fabrication methods The present , changes in shape of spherical convex surfaces: (2htr - ht') , ored to obtain a subscription to this Russian journal for the last.
In mathematics, non-Euclidean geometry consists of two geometries based on axioms closely , Then, around , the Hungarian mathematician János Bolyai and the Russian mathematician Nikolai Ivanovich Lobachevsky , The simplest model for elliptic geometry is a sphere, where lines are "great circles" (such as the.