| Gravity Balancing of a Human Leg using an External Orthosis Recent countries visiting this post |  |
 | 5 | United States |
 | 3 | Singapore |
 | 1 | |
 | 1 | Russian Federation |
| Gravity Balancing of a Human Leg using an External Orthosis Recent countries visiting this post | |
| 5 | United States |
| 3 | Singapore |
| 1 | |
| 1 | Russian Federation |