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