| Interactive 3D Model Acquisition and Tracking of Building Block Structures Recent countries visiting this post |  |
 | 14 | China |
 | 9 | |
 | 5 | United States |
 | 3 | Germany |
 | 1 | Italy |
| Interactive 3D Model Acquisition and Tracking of Building Block Structures Recent countries visiting this post | |
| 14 | China |
| 9 | |
| 5 | United States |
| 3 | Germany |
| 1 | Italy |