long bone in arm that runs from shoulder to elbow
Don Brutzman, Joe Williams, John Carlson, Damon Hernandez
usage examples https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Medical
X3D-Edit 4.0, https://www.web3d.org/x3d/tools/X3D-Edit
X3D Tidy, https://www.web3d.org/x3d/stylesheets/X3dTidy.html