An encoder with a light emitted editing {HEAD ~ wheel comprises} an editing wheel defines a wheel body and {TAIL ~ a hole} in its middle portion 
An encoder with a light emitted editing { HEAD ~ wheel comprises } an editing wheel defines a wheel body and { TAIL ~ a hole } in its middle portion
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH