frequency of tone的相關資料：
臨近單詞
frequency axis
frequency
Frequency Division Multiplexing System
frequency trembler pest-killing lamp
frequency-sharping deemphasis network
Frequency Converter for Tension Control
frequency modulating stereo transmitter
frequency-modulated television signal
frequency and time-division data link
frequency-modulated broadcast ba-nd
frequency-conversion speed regulating
frequency domain electromagnetic method
