A cold forging forming method for forming {HEAD ~ a three dimensional hollow article} without {TAIL ~ rough edges}, wherein, an alloy of low melting point is used instead of mercury as a filler with plasticity 
without
A cold forging forming method for forming { HEAD ~ a three dimensional hollow article } without { TAIL ~ rough edges } , wherein , an alloy of low melting point is used instead of mercury as a filler with plasticity
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH