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 {HEAD ~ a length} that is equal to {TAIL ~ the minimum} required 
is equal to
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 { HEAD ~ a length } that is equal to { TAIL ~ the minimum } required
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 HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH