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Priority claimed from FR8510217Aexternal-prioritypatent/FR2584386B1/fr
Application filed by Charbonnages Ste ChimiquefiledCriticalCharbonnages Ste Chimique
Publication of NO870877D0publicationCriticalpatent/NO870877D0/no
Publication of NO870877LpublicationCriticalpatent/NO870877L/no
Publication of NO168467BpublicationCriticalpatent/NO168467B/no
Publication of NO168467CpublicationCriticalpatent/NO168467C/no