英文關鍵字
air
audio
automobile
automotive
band
bandwidth
broadcast
channel
closeup
communicate
communication
console
control
dashboard
dial
digital
disc
electronic
engineer
equipment
frequency
glow
grid
hand
hifi
knob
listen
listening
modern
motor
music
object
panel
radio
receiver
school
signal
sound
station
stereo
technology
tune
tuner
tuning
volume
wave