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