The apparatus also includes {HEAD ~ a funnel} disposed at {TAIL ~ one end} of the trough  
disposed at
The apparatus also includes { HEAD ~ a funnel } disposed at { TAIL ~ one end } of the trough
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH