adapting the second roller to receive {HEAD ~ additive material} on {TAIL ~ its roll face} from the roll face of the first roller 
on
adapting the second roller to receive { HEAD ~ additive material } on { TAIL ~ its roll face } from the roll face of the first roller
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH