 |
| |||
| 电气参考地; 标淮地 | |||
| 参考地 | |||
|
reference ground : 10 phrases in 6 subjects |
| Aviation | 5 |
| Earth sciences | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Nautical | 1 |
| Technology | 1 |
|
| |||
| 电气参考地; 标淮地 | |||
| 参考地 | |||
|
reference ground : 10 phrases in 6 subjects |
| Aviation | 5 |
| Earth sciences | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Nautical | 1 |
| Technology | 1 |