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E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
E04C5/203—Circular and spherical spacers
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FR7271A1960-11-021960-11-02Calage des coffrages et des ferraillages dans les constructions en béton armé
ExpiredFR1279308A
(fr)
éléments métalliques destinés à former les coffrages intérieurs et perdus de corps creux, notamment les éléments préfabriqués de dalles et planchers en béton