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