the examining of material to determine its integrity, without altering the chemical or physical properties using such methods as X-rays, eddy currents, ultrasonics, magnetic devices and dye penetrants
Equivalent non-destructive test methods are permitted, provided that the results referred to in items 4.1.2 and 4.2 above can be obtained either entirely by means of the substitute test or by calculation from the results of the substitute test.
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