a cup shaped {HEAD ~ housing} having an open mouth and having {TAIL ~ an inlet} and an outlet formed therein 
a cup shaped { HEAD ~ housing } having an open mouth and having { TAIL ~ an inlet } and an outlet formed therein
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH