| |||
| 地球参考坐标系; 地球参考格网 | |||
|
terrestrial reference frame : 7 phrases in 5 subjects |
| Air defense | 1 |
| Earth sciences | 3 |
| Space | 1 |
| Surveying | 1 |
| United Nations | 1 |
| |||
| 地球参考坐标系; 地球参考格网 | |||
|
terrestrial reference frame : 7 phrases in 5 subjects |
| Air defense | 1 |
| Earth sciences | 3 |
| Space | 1 |
| Surveying | 1 |
| United Nations | 1 |