{HEAD ~ These switches} are used in 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 {TAIL ~ the minimum} required 
{ HEAD ~ These switches } are used in 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 { TAIL ~ the minimum } required
HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH