| |||
| 脉码调制-幅度调制 | |||
|
pulse code modulation -amplitude modulation : 10 phrases in 8 subjects |
| Earth sciences | 1 |
| Electronics | 3 |
| Geophysics | 1 |
| Information technology | 1 |
| Military | 1 |
| Space | 1 |
| Technology | 1 |
| Telecommunications | 1 |
| |||
| 脉码调制-幅度调制 | |||
|
pulse code modulation -amplitude modulation : 10 phrases in 8 subjects |
| Earth sciences | 1 |
| Electronics | 3 |
| Geophysics | 1 |
| Information technology | 1 |
| Military | 1 |
| Space | 1 |
| Technology | 1 |
| Telecommunications | 1 |