The container also has {HEAD ~ a lower tubular extension} defining {TAIL ~ an outlet port} for the receptacle chamber 
defining
The container also has { HEAD ~ a lower tubular extension } defining { TAIL ~ an outlet port } for the receptacle chamber
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH