角 角 角 钢for this place with magnetic powder and ultrasonic two detection means to test has a good effect.first, whether there is a surface defect with magnetic detection angle edge, if there is no surface defects, then the ultrasonic probe oblique detection, crack amplitude is characterized by a defect...
and sifting (class / ) magnetic and fluid suspension (class / ) magnetic and stratifying (class / ) mercurial suspension and mercurial adhesion (class / ) mercurial adhesion or suspension and sifting (class / ) mercurial adhesion or suspension and stratifying (class / ) sifting and stratifying (class...