| Untethered Hovering Flapping Flight of a 3D-Printed Mechanical Insect Recent countries visiting this post |  |
 | 7 | United States |
 | 1 | Germany |
 | 1 |
| Untethered Hovering Flapping Flight of a 3D-Printed Mechanical Insect Recent countries visiting this post | |
| 7 | United States |
| 1 | Germany |
| 1 |