Free ends of {TAIL ~ roving} protrude from {HEAD ~ borehole openings} and are splayed apart into individual filaments  
Free ends of { TAIL ~ roving } protrude from { HEAD ~ borehole openings } and are splayed apart into individual filaments
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH