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Photographs of cavitation bubbles taken with the still camera with the exposure of 2 ms at 23 kHz for the FG outputs of (a) 100, (b) 200, (c) 300, (d) 500, (e) 600, (f) 700, (g) 900, (h) 1000, (i) 1100, and (j) 1200 mVp-p, respectively [69]. Copyright 2001, with the permission from IOP Publishing.
