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