securing a backing sheet of supple fabric material with one broadside thereof affixed to {HEAD ~ the other broadside} of {TAIL ~ the sheet} of flexible, resilient material 
of
securing a backing sheet of supple fabric material with one broadside thereof affixed to { HEAD ~ the other broadside } of { TAIL ~ the sheet } of flexible , resilient material
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH