while(<DATA>)
{
print "$1\t$2\n",if($_ =~ /(t\.min|t\.max)\s*=\s*(.*?);/);
}

__END__
MML v2.0;
import defaultunit;
unit conversion on;

math top {
    t.min = 0;
    t.max = 3600;
    t.delta = 5;