英文關鍵字
amplitude
analog
analysis
audio
beam
changes
college
displays
division
electrical
electronics
engineering
equipment
glowing
green
impulse
industry
instrument
instrumentation
laboratories
loop
measure
measurement
old
oscilloscope
oscilloscopes
pattern
research
scale
science
screen
serrated
signal
signals
sine
soviet
technical
technology
the
trace
universities
ussr
vintage
wave
waveforms
with