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