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