frequency hopper
| direct sequence modulation
| frequency hopper | |
| oil | 跳频器 |
| direct sequence modulation | |
| telecom. | 直接序列调制 |
| |||
| 跳频器 | |||
|
frequency hopper : 2 phrases in 2 subjects |
| Information technology | 1 |
| Telecommunications | 1 |