a housing having a housing cavity and a top plate and {HEAD ~ bottom plate} enclosing said {TAIL ~ cavity}, said housing having a first and second inlet port and an outlet port from said cavity 
enclosing
a housing having a housing cavity and a top plate and { HEAD ~ bottom plate } enclosing said { TAIL ~ cavity } , said housing having a first and second inlet port and an outlet port from said cavity
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH