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Copyright © 2016 Wetzel Engineering. All Rights Reserved.
B ATransmitter
¼ λ
Transmitter
AB
ReceiversObjectbeingexamined
Defect
Copyright © 2016 Wetzel Engineering. All Rights Reserved.
Marcelling
Crack
Marcelling
Multiplewrinklesincloseproximity
Single,largewrinkle
Copyright © 2016 Wetzel Engineering. All Rights Reserved.
Crackandsurroundingdelamination
ScoresinBalsaWood
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