A roller ultrasonic probe was designed in the subject, and it sends ultrasonic wave to detect the pipe wall's thickness.
研究过程中设计的超声波轮式探头，发出超声波信号测量管道壁厚。
With the detection system and the probe set on a pipe machine car, pipe wall's thickness can be detected periodically by a method of dry couple.
检测系统及探头装配在管道机器车上，可对管壁的厚度进行定期检测。
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