扭转基频
basic frequency of torsion
八选一视音频转换器
one-out-of-eight audiovideo frequency converter
倍频转换效率
double frequency conversion efficiency
double frequency efficiency
SHG efficiency
高频转换开关
high-frequency change-over switch
光频转换
light-to-frequency converters
光频转换传感器
light-to-frequency converter
光频转换器
light-to-frequency converter
light to frequency converter
optical frequency converter