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E04C3/00—Structural elongated elements designed for load-supporting
E04C3/38—Arched girders or portal frames
E04C3/44—Arched girders or portal frames of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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FR28054D1923-03-021923-03-02Perfectionnements à la construction des couvertures en béton armé et autres ouvrages de toutes portées
ExpiredFR28054E
(fr)