San Francisco Health Care Security Ordinance & its intersection with the Health Care Accountability Ordinance Joannie C. Chang Office of Labor Standards Enforcement City & County of San Francisco January 2009.
In geometry, a torus (plural tori) is a surface of revolution generated by revolving a circle in three-dimensional space about an axis coplanar with the circle.he flat torus is a torus with the metric inherited from its representation as the quotient, R 2 / L, where L is a discrete subgroup of R 2 isomorphic to Z 2. This gives the quotient the structure of a Riemannian manifold.
These single (one-sided) growths are made of bone â non-movable, smooth, and hard to the touch. 1  Lingual torus starts in the teens as a small bump on the mandible, and grows larger in older dental patients. Removal of lingual torus is not necessary unless: 2  The bumps grow so large they touch and irritate each other.