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
E04C1/397—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 serving for locating conduits
Boitier pour appareillage electrique en vue de la prefabrication de reseaux de canalisations electriques, comprenant un moyen de fixation hermaphrodite