The rear part or portion 24 of the chamber 2, i.e. the part closest to the outlet end 18, is partly separated from {HEAD ~ the remaining part} of {TAIL ~ the chamber} by an annular partitioning 25 
of
The rear part or portion 24 of the chamber 2 , i.e. the part closest to the outlet end 18 , is partly separated from { HEAD ~ the remaining part } of { TAIL ~ the chamber } by an annular partitioning 25
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH