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Prüfung
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Ultrasonic equipment for metal flaw detection
Results of tests on Portland cement of recent production
Methods of testing the insulation and resistance of street railway lines
Magnetic and penetrant methods of non-destructive testing
Fluoroscopic inspection provides rapid check of aircraft alloy castings
Economics of materials testing by automobile manufacturer
Destructive and non-destructive testing
Because it's tested, millions travel safely -- H
Amsler dynamometer and inspection car