异常
发表于 2025-3-28 15:48:27
http://reply.papertrans.cn/95/9443/944228/944228_41.png
predict
发表于 2025-3-28 19:32:31
gives the case thickness in an A-scope display. It, however, requires the parts to be immersed in a water tank for acoustic coupling, making on-line inspection inapplicable. Another shortcoming is that the dominant front echo masks the signal from a shallow interface and this technique fails for a t