two <b>Target Vertices</b>, which belong to the same edge of the
face being meshed.</li>
</ul>
-For groups of face, the groups must contain equal number of faces and
-they must form topologically equal structures.
+
+The groups of faces are suitable for this algorithm only if they
+contain an equal number of faces and form topologically equal
+structures.
\n <b>Projection 1D-2D</b> algorithm differs from <b>Projection 2D</b>
algorithm in one aspect: it generates mesh segments on edges of
