5REQUICHA A A G. Solid modeling and beyond[J]. IEEE Computer Graphics and Applications, 1992, 12(5) :31-44.
6ANSI. ANSI Standard Y14. 5. 1M. Dimensioning and tolerancing principles[S]. New York: ASME Press, 1994.
7SHAH J J. Dimension and tolerance modeling and transformations in feature based design and manufacturing [J]. Journal of Intelligent Manufacturing, 1998, 9(5) :475-488.
8GUILFORD J. Representational primitives for geometric toleraneing[J]. CAD, 1993, 25(9) :577-586.
9ROY U, LIB. Representation and interpretation of geometric tolerances for polyhedral objects-I. Form tolerances[J]. CAD, 1998, :30(2):151-161.
10ROY U, LIB. Representation and interpretation of geometric tolerances for polyhedral objects--II. Size, orientation and position tolerance [J]. CAD, 1998, 30 (4): 273-285.