英文關鍵字
ammeter
amper
amperage
ampere
ampermeter
amps
analogue
arrow
black
close
closeup
current
display
electric
electrical
electrician
electricity
electronics
engineering
equipment
gage
gauge
indicator
industrial
industry
instrument
measure
measurement
meter
microammeter
microamp
moving
needle
old
pointer
precision
reading
retro
scale
show
technology
tool
use
vintage
working