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E04C1/00—Building elements of block or other shape for the construction of parts of buildings
E04C1/39—Building elements of block or other shape for the construction of parts of buildings characterised by special adaptations, e.g. serving for locating conduits, for forming soffits, cornices, or shelves, for fixing wall-plates or door-frames, for claustra
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FR555369D1922-08-251922-08-25Maçonnerie imperméable à l'humidité
ExpiredFR555369A
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