变声频雷送
variable audio-frequency radiosonde
变压器耦合声频放大器
audio frequency amplifier
不失真声频压缩
lossless audio compression
超声频脉冲电弧
ultrasonic frequency pulsed are
超声频响模型
ultrasonic frequency response model
低声频除灰器
lower sonic frequency ash remover
电感耦合声频放大器
audio frequency amplifier
电声频率计
electroacoustic frequency meter
电阻耦合声频放大器
audio frequency amplifier