| |||
| 水平参考 | |||
| 水平基准 | |||
| 水平基准 (面) | |||
|
horizontal reference : 8 phrases in 6 subjects |
| Aviation | 2 |
| Engineering geology | 1 |
| Mining | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Sports | 1 |
| |||
| 水平参考 | |||
| 水平基准 | |||
| 水平基准 (面) | |||
|
horizontal reference : 8 phrases in 6 subjects |
| Aviation | 2 |
| Engineering geology | 1 |
| Mining | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Sports | 1 |