| http://www.w3.org/ns/prov#value | - U.S. Pat. No. 6,199,563, which is incorporated by reference herein, adds a modest improvement to ultrasonicators of the prior art by including a rotational mechanism for sonicating a workpiece in an acid solution, but it fails to provide means for containing the acidic gases, preventing unwanted contaminants from the aqueous solution and/or rotational mechanism wear and tear from entering the acid
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