A reversing hydromechanical transmission designed for transmitting {HEAD ~ power} from the engine to the power consumer, {TAIL ~ i.e. the driven mechanism}, of road building machines 
to
A reversing hydromechanical transmission designed for transmitting { HEAD ~ power } from the engine to the power consumer , { TAIL ~ i.e. the driven mechanism } , of road building machines
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH