B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
B28B7/00—Moulds; Cores; Mandrels
B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
B28B7/0035—Moulds characterised by the way in which the sidewalls of the mould and the moulded article move with respect to each other during demoulding
Structure porteuse en beton arme, procede pour sa realisation ainsi qu'element prefabrique en beton arme, bati de coffrage et procede pour la fabrication d'elements prefabriques en beton arme et elements prefabriques en forme de caissons comportant des plaques jumelees