A vehicle has an engine, an accelerator for controlling the rotary speed of the engine, an axle and a multi speed transmission for transmitting {HEAD ~ power} from the engine to {TAIL ~ the axle} 
to
A vehicle has an engine , an accelerator for controlling the rotary speed of the engine , an axle and a multi speed transmission for transmitting { HEAD ~ power } from the engine to { TAIL ~ the axle }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL