The light source is capable of sending a light to {HEAD ~ the light} receiving {TAIL ~ means} of the editing wheel 
receiving
The light source is capable of sending a light to { HEAD ~ the light } receiving { TAIL ~ means } of the editing wheel
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH