| Specializations for land walking are mainly found in the forelimbs, including a ball-and-socket joint in the shoulder, like that of mammals. |
| Fitted with a ball-and-socket joint for mounting on a tripod, and complete with wooden field case. |
| Hollows are very different in shape and size, so each camera was attached to a ball-and-socket joint to allow us to adjust the orientation of cameras inside the hollow. |
| Supported on a tripod by means of a ball-and-socket joint and screw-tightening device. |
| The hip joint is a ball-and-socket joint because the spherical head of the femur moves inside the cup-shaped acetabulum. |
| The shoulder, a ball-and-socket joint, can move in almost any direction, says certified trainer Jennifer Zerling. |
