The method 7 wherein {HEAD ~ the crossing unbonded fibers} also contain man made or {TAIL ~ natural organic fibers} 
contain
The method 7 wherein { HEAD ~ the crossing unbonded fibers } also contain man made or { TAIL ~ natural organic fibers }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL