{HEAD ~ These switches} are used in {TAIL ~ conjunction} with appropriate circuitry to make sure a minimum copy length is achieved even though the original document may not have a length that is equal to the minimum required 
are used in
{ HEAD ~ These switches } are used in { TAIL ~ conjunction } with appropriate circuitry to make sure a minimum copy length is achieved even though the original document may not have a length that is equal to the minimum required
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH