The mixture can be subjected to, e.g., a compression or injection molding process, to obtain {HEAD ~ solid spheres} for {TAIL ~ the center} or hemispherical shells for forming an intermediate layer 
for
The mixture can be subjected to , e.g. , a compression or injection molding process , to obtain { HEAD ~ solid spheres } for { TAIL ~ the center } or hemispherical shells for forming an intermediate layer
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 OTH OTH OTH OTH OTH OTH OTH OTH