By unbounded is meant that the adhesive clusters do not include any applied linear boundary or perimeter of {TAIL ~ adhesive} defining {HEAD ~ the cluster area} 
By unbounded is meant that the adhesive clusters do not include any applied linear boundary or perimeter of { TAIL ~ adhesive } defining { HEAD ~ the cluster area }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD