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Priority claimed from US406295Aexternal-prioritypatent/US3267601A/en
Priority claimed from US549005Aexternal-prioritypatent/US3348328A/en
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Publication of BE698195ApublicationCriticalpatent/BE698195A/fr
Dispositif écrou de mise en place rapide, à deux demi-écrous, et agencement de blocage notamment pour coffrage de béton, utilisant un tel dispositif écrou