A third one of {HEAD ~ the outlets/intakes} of {TAIL ~ the connector} communicates with the cavity of the hose 
of
A third one of { HEAD ~ the outlets / intakes } of { TAIL ~ the connector } communicates with the cavity of the hose
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH