For Viewing large drawings, pls click the drawings.

To see the animated drawing, pls click Animated Gif. Will be available soon

To see the AVI movie, pls click AVI. Will be available soon

R-node: Fig1 (a) Animated Gif AVI	S-node: Fig1 (b) Animated Gif AVI	P-node: Fig2 (a) Animated Gif AVI
Special case: Fig2 (b) Animated Gif AVI	B-center: Fig3 (a) Animated Gif AVI	c-center: Fig3 (b) Animated Gif AVI
B-center Animated Gif AVI	c-cente Animated Gif AVI	Icosahedron