The beads 21 are preferably commercial stock plastic beads of {HEAD ~ the type} commonly available for {TAIL ~ plastic injection molding} of commercial plastic parts 
commonly available for
The beads 21 are preferably commercial stock plastic beads of { HEAD ~ the type } commonly available for { TAIL ~ plastic injection molding } of commercial plastic parts
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH