脉冲回波
pulsed echo
pulse echo waves
echo impulse
pulse echo
pulse reflecting wave
Ultrasonic Impact-echo Method
同轴电缆脉冲回波测试仪
coaxial cable pulse echo tester
超声回波脉冲数字式测厚仪
ultrasonic echo-impulse digital thickness meter
脉冲时间调制
pulse-time modulation
pulse-time modulation(PTM
脉冲时间响应函数
response function of unit impulse time