| |||
| 刻度源 | |||
| 校准用源 | |||
| 校准源; 定标源 | |||
| 参考源 | |||
|
calibration source : 12 phrases in 7 subjects |
| Aviation | 1 |
| Cartography | 1 |
| Electronics | 1 |
| Nuclear physics | 1 |
| Oil / petroleum | 1 |
| Space | 4 |
| Technology | 3 |
| |||
| 刻度源 | |||
| 校准用源 | |||
| 校准源; 定标源 | |||
| 参考源 | |||
|
calibration source : 12 phrases in 7 subjects |
| Aviation | 1 |
| Cartography | 1 |
| Electronics | 1 |
| Nuclear physics | 1 |
| Oil / petroleum | 1 |
| Space | 4 |
| Technology | 3 |