Comparison test and practical experience clearly showed, the defect detectibility of the fluorescent magneticparticle testing is far higher than the black magnetic particle testing.
对比试验与实践经验表明，荧光磁粉检测比黑色磁粉检测有高得多的缺陷检出率。
2
Eddy current, magnetic leak, magneticparticle and ultrasonic test are the main methods used for pumping rod test.
目前，对抽油杆的自动探伤主要有涡流、漏磁、磁粉及超声方法，各有其优缺点及适用范围。
3
It is solving these key problems that makes a new way for automatically distinguishing defects on test workpiece surface with magneticparticle inspection.