frequency code频率码frequencyn.频繁；频率Frequency of Hitting Price Limitfrequency discrimination circuit鉴频电路frequency synthesizing technique频率合成技术frequency of sex chromatia cells性染色质／体细胞的频率frequency reconfigurable antenna频率可重构天线frequency theory of distribution分布的频率理论frequency-synthesizer software频率合成器frequency change synchronization换频同步口frequency hoppingspread spectrum跳频扩频Frequency discriminator pass Band鉴频器通频带