field (\@GRD, 1, \@GRDF1);
                 field (\@GRD, 2, \@GRDF2);
                 field (\@GRD, 3, \@GRDF3);
                 field (\@GRD, 4, \@GRDF4);
                 field (\@GRD, 5, \@GRDF5);
                 field (\@GRD, 6, \@GRDF6);