The silencer of FIG 1 has a pot like housing 1 with {TAIL ~ a cylindrical pot casing} 2 and with {HEAD ~ a pot bottom} 3 
The silencer of FIG 1 has a pot like housing 1 with { TAIL ~ a cylindrical pot casing } 2 and with { HEAD ~ a pot bottom } 3
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH