{HEAD ~ A cold forging forming method} for forming {TAIL ~ a three dimensional hollow article} comprising the following steps: 
for forming
{ HEAD ~ A cold forging forming method } for forming { TAIL ~ a three dimensional hollow article } comprising the following steps :
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH