A process 1, wherein the powder of a synthetic resin comprises {HEAD ~ fine particles} having {TAIL ~ a spherical shape} 
A process 1 , wherein the powder of a synthetic resin comprises { HEAD ~ fine particles } having { TAIL ~ a spherical shape }
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