{HEAD ~ A dual tone multiple frequency signal generating apparatus} of the present invention is provided with {TAIL ~ a high group frequency divider} and a low group frequency divider for dividing a reference frequency signal into high group frequencies and low group frequencies, respectively 
{ HEAD ~ A dual tone multiple frequency signal generating apparatus } of the present invention is provided with { TAIL ~ a high group frequency divider } and a low group frequency divider for dividing a reference frequency signal into high group frequencies and low group frequencies , respectively
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