{TAIL ~ The beads} may be added to substances such as explosives in {HEAD ~ order} to create a distinctive optical signature that identifies a manufacturer, lot number, etc. in the event of the need for forensic analysis 
{ TAIL ~ The beads } may be added to substances such as explosives in { HEAD ~ order } to create a distinctive optical signature that identifies a manufacturer , lot number , etc . in the event of the need for forensic analysis
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH