Nondestructivetesting. Ultrasonic testing. Methods for specifying ultrasonic apparatus.
无损检验。超声波。超声波检验仪器的测定方法。
2
En 473 Non-DestructiveTesting-Qualification And Certification Of NDT Personnel-General principles.
EN 473无损测试人员认证和证书——通用标准。
3
Babcock International has developed a new non-destructivetesting (NDT) technique for naval ship tailshafts that could reduce assessment time from 18 weeks to one month.