The lower roll has {HEAD ~ an applicator chamber} of {TAIL ~ a nozzle applicator} in the region of its periphery remote from the upper roll 
The lower roll has { HEAD ~ an applicator chamber } of { TAIL ~ a nozzle applicator } in the region of its periphery remote from the upper roll
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH