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