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