finger-type contact的意思|示意

The author introduces a pipe defect locating method by contact type ultrasonic detection — finger oil dipping touching method and analyses the theoretical basis of defect locating by this method.

介绍了钢管接触法超声波探伤缺陷定位方法——手指蘸油触摸法，分析了利用此种方法进行缺陷定位的理论依据。

The mechanical type chooses the tier utensil thanks to the rub , Cause easily the contact finger to wear and tear and has ariseed loose contact .

机械式选层器由于磨擦，轻易导致触头磨损而出现接触不良。