sonic frequency controlling amplifier
sonic frequency cymometer
sonic frequency response correction
sonic frequency spectrum recording meter
sonic frequency stress wave method
lower sonic frequency ash remover
AFA (audio-frequency amplifier)
audifier-frequency amplifier
audio frequency amplifier
声频放大器
音频放大器
音频数据流
声频增幅器
电阻耦合声频放大器
电感耦合声频放大器
变压器耦合声频放大器
Audio Frequency Amplifier VFA
audio-frequency amplifier
beat frequency amplifier
Broad Band Low Frequency Amplifier
carrier frequency amplifier
double-tuned intermediate frequency amplifier
electing frequency amplifier
HFA High Frequency Amplifier
High Frequency Amplifier