| 摘要 |
The spacial structure comprises knuckles, with a hollow base piece (1) with a spherical shell outside shape. Equidistantly positioned holes (3) are angled (alpha) w.r.t. one another, with the permieter area of the base bent inward. A second hollow base piece (2) has an outside shape approximately that of a spherical shell, wuth equidistant holes similarly angled (alpha) w.r.t. each other. The base pieces are joined to provide the knuckle, with all the holes equidistantly angled. The second base piece can have a bent perimeter area (12) facing the bent area of the first base to form a joint. |
