Выражение встречается в следующем контексте:
The wide plate test has been used for about a half century to assess the
structural significance of weld defects. Early work mostly utilized
plate specimens, but within the last 20 years the curved wide plate test
(CWPT) has become popular for pipeline girth weld testing. Even
more recently, the CWPT has been used to measure girth weld strain
capacity for strain-based design applications.

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