| 摘要 |
A system responsive to pressure differential is provided for non-destructive testing of the bonding between a face sheet and the attached core of a laminated or like composited structure, including an internally evacuated transducer arranged to glide easily over the surface being scanned while maintaining a constant or pulsating vacuum. Displacement of the face sheet is detected by the transducer which generates a signal indicative of the extent of the defective bond.
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