Electromagnetic ultrasonic nondestructive testing technique is based on the principle of electromagnetic induction of new detection technology, the testing process, it does not require coupling medium can be achieved at high temperature, high pressure and other conditions of the testing work, so highly valued in the field of nondestructive testing. Ultrasound can also refine the electromagnetic electromagnetic ultrasonic plate wave, surface waves, longitudinal waves, shear waves in several forms, which are ...