And they used what they called eddycurrenttesting.
他们使用涡流检测。
2
The basic principle of eddycurrenttesting is introduced and the coil impedance responses due to the variations of the probe coil lift-off are analyzed and studied.
简要介绍了涡流检测的基本原理和涡流探头的特性； 分析和研究了涡流检测探头提离变化对阻抗的影响；
3
Eddycurrenttesting system bearing bearing parts dedicated to the automatic detection equipment.