During the process of steel production, the flaws in steel casting are detected by
A. resonant vibrations.
B. infrasonic vibrations.
C. longitudinal vibrations.
D. ultrasonic vibrations
During the process of steel production, the flaws in steel casting are detected by ultrasonic vibrations.
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Asked 9/19/2012 3:51:27 PM
Updated 2/19/2018 6:56:53 AM
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Masamune [2/19/2018 6:56:53 AM]
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