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     query1.close;
     query1.SQL.clear;
     query1.SQL.add('select count(*) from (select count(º½°àºÅ) from ');
     query1.SQL.add('tempttable group BY º½°àºÅ ');
     query1.SQL.add('having (max(º½Ïò)-min(º½Ïò))>=15))');
     Query1.open;
     NH:=query1.fields[0].asinteger;
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