  This article extends the range of 1-DOF rigid-foldable developable
quadrilateral creased papers. In a previous article, we put forward a
sufficient and necessary condition for a quadrilateral creased paper to be
rigid-foldable, and introduce a special sufficient condition that is convenient
for practical use, generating quadrilateral creased paper by stitching basic
units. In this article we develop new flat-foldable units and show how these
can be used to construct a series of more complex rigid-foldable developable
quadrilateral creased papers.
