frequency plot频率相位,特性曲线
frequencyn.频繁;频率
frequency modulation screens调频加网
frequency modulation exciter调频激励器
frequency-generating rotor频率发生转子
frequency sensitive detector频率检波器
frequency modulated constant调频常数
frequency- change speeding变频调速
frequency of optimum traffic最佳通信频率
frequency control technology变频调速技术
frequency of inducing callus愈伤组织诱导率