Pham HQ, Le VS, Vu MH, Phan MQB, Nguyen NK, Nguyen QV. Research on the manufacture of equipment for detecting defects of disjointed, small diameter steel pipes by magnetic flux leakage method. PVJ [Internet]. 2022Apr.18 [cited 2023Jun.6];30:26 -34. Available from: http://pvj.com.vn/index.php/TCDK/article/view/815