Figure 5: Ball Restrained in Welded Steel Tetrahedron

Welded steel tetrahedron with its central ball Welded steel tetrahedron with
its central ball
Central ball completely
restrained in terms of
all 12 degrees of freedom
of all individual systems 		Central ball completely restrained in terms of all 12 degrees of freedom of all individual systems

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Copyright 1999, Estate of Buckminster Fuller, all rights reserved.