 |
| |||
| carrier signal frequency | |||
| 载波信号频率: 4 phrases in 4 subjects |
| Air defense | 1 |
| Computer networks | 1 |
| Project management | 1 |
| Technology | 1 |
|
| |||
| carrier signal frequency | |||
| 载波信号频率: 4 phrases in 4 subjects |
| Air defense | 1 |
| Computer networks | 1 |
| Project management | 1 |
| Technology | 1 |