The panel is optimized in term of space requirement and weight for {HEAD ~ use} in {TAIL ~ aircraft} and has improved sound absorption properties 
in
The panel is optimized in term of space requirement and weight for { HEAD ~ use } in { TAIL ~ aircraft } and has improved sound absorption properties
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH