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Hash :
Numerous, small indications appearing on the oscilloscope of the ultrasonic instrument indicative of many small inhomogeneities in the material or background noise; also referred to as grass. (RP 2X).
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Numerous, small indications appearing on the oscilloscope of the ultrasonic instrument indicative of many small inhomogeneities in the material or background noise; also referred to as grass. (RP 2X).