The apparatus includes {HEAD ~ a trough} which extends from a take off location defined by {TAIL ~ a take off roller}  
The apparatus includes { HEAD ~ a trough } which extends from a take off location defined by { TAIL ~ a take off roller }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH