您要查找的是不是：
- DSSS直序扩频 Direct Sequence Spread Spectrum
- 直序扩频通信（DSSS） direct sequence spread spectrum (DSSS)
- 具有低截获概率的直序扩频系统 A Low Probability of Intercept Direct Sequence Spread Spectrum Systems
- 直序扩频 DSSS
- 直序扩频通信 direct seqeuence spread spectrdm communication
- 直序扩频信号 DSSS signal
- 直销 direct marketing; door-to-door sale
- 直发 straight hair
- 频数 frequence
- 逆页序打印 reverse print order
- 直的 straight
- 主频 dominant frequency
- 逆序 negative sequence
- 直飞 non-stop flight to
- 倍频 frequency doubling
- 载频 carrier frequency
- 直击 uppercut
- 正序 positive-sequence
- 直前 right ahead
- 频点 frequency point
