This paper introduces promiseful applications of a new wave type so called ultra sonic creeping wave in NDT.
本文介绍了超声无损检测中一种具有较好应用前景的波型──超声爬波。
英语百科
Creeping wave
According to the principle of diffraction, when a wave front passes an obstruction, it spreads out into the shadowed space. A creeping wave in electromagnetism or acoustics is the wave that is diffracted around the shadowed surface of a smooth body such as a sphere.