E04F13/07
composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
E04F13/07
composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
E04F13/08
composed of a plurality of similar covering or lining elements,
E04F13/08
composed of a plurality of similar covering or lining elements,
E04F13/12
of metal; or with an outer layer of metal or enameled metal
E04F13/12
of metal; or with an outer layer of metal or enameled metal