| |||
| 脉码调制/移频键控/频率调制 | |||
|
pulse code modulation /frequency shift keying/frequency modulation : 4 phrases in 2 subjects |
| Electronics | 3 |
| Geophysics | 1 |
| |||
| 脉码调制/移频键控/频率调制 | |||
|
pulse code modulation /frequency shift keying/frequency modulation : 4 phrases in 2 subjects |
| Electronics | 3 |
| Geophysics | 1 |