Non destructive testing. 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。
En 473 Non-Destructive Testing-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。
Babcock International has developed a new non-destructive testing (NDT) technique for naval ship tailshafts that could reduce assessment time from 18 weeks to one month.
Badcock国际部开发了一种新的无损(NDT)海军舰船尾轴的测试技术，该技术可以将原来需要18周的测试时间缩短到1个月。
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