英文關鍵字
abstract
amplifier
and
audio
bar
black
candles
crystal
digital
disco
display
electronic
equalizer
graph
graphic
green
indicator
light
liquid
meter
mixer
music
off
out
radio
record
recorder
sound
stereo
studio
technology
track
turn
volume
英文關鍵字
abstract
amplifier
and
audio
bar
black
candles
crystal
digital
disco
display
electronic
equalizer
graph
graphic
green
indicator
light
liquid
meter
mixer
music
off
out
radio
record
recorder
sound
stereo
studio
technology
track
turn
volume