IndexNo:805811:XPvWDqztRSPlEHOII
| 投稿者 | Liam |
|---|---|
| 投稿日時 | 2014/08/10 12:18:14 |
| Three years menoboy ig He looked for similarities between the old map and the current topography. The researchers than used GPR, which sends radio waves into the ground and measures the echo of the signals that bounce off of objects underground. | |