http://www.w3.org/ns/prov#value | - ted plaster arch or semi-arch that is installation ready.It is an additional object of the instant invention to provide a prefabricated plaster arch or semi-arch that is easy to install and inexpensive.It is another object of the instant invention to provide a prefabricated plaster arch or semi-arch that can be installed with common fasteners and only requires that the gap between the arch and wal
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