The silencer 1, wherein the fibers of the fibrous material have {HEAD ~ a maximum length} of {TAIL ~ 5 mm} 
of
The silencer 1 , wherein the fibers of the fibrous material have { HEAD ~ a maximum length } of { TAIL ~ 5 mm }
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