The vibration device 1 wherein {HEAD ~ said gripping means} substantially surrounds said workpiece about {TAIL ~ said peripheral edge} 
The vibration device 1 wherein { HEAD ~ said gripping means } substantially surrounds said workpiece about { TAIL ~ said peripheral edge }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL