Preferably, the annual chamber extends from {TAIL ~ the inlet port} to an axially opposite end of {HEAD ~ the first hub collar} 
Preferably , the annual chamber extends from { TAIL ~ the inlet port } to an axially opposite end of { HEAD ~ the first hub collar }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD