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E04C1/00—Building elements of block or other shape for the construction of parts of buildings
E04C1/40—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts
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FR934025D1946-09-301946-09-30
Metal boxes used in the manufacture of building materials
ExpiredFR934025A
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