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