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Mathematical Problems in Engineering
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Mathematical Problems in Engineering
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2017
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Article
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Fig 7
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Research Article
Surface Crack Detection in Prestressed Concrete Cylinder Pipes Using BOTDA Strain Sensors
Figure 7
Strains measured using PEPFOSs for cases 1–3: (a) lower circle, (b) middle circle, and (c) upper circle.
(a)
(b)
(c)