There is disclosed {HEAD ~ a vibration device} for de burring a workpiece, such as {TAIL ~ a foundry core} 13, 22 
There is disclosed { HEAD ~ a vibration device } for de burring a workpiece , such as { TAIL ~ a foundry core } 13 , 22
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH