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Priority claimed from GB1576059Aexternal-prioritypatent/GB942002A/en
Priority claimed from FR823556Aexternal-prioritypatent/FR1253153A/fr
Application filed by Superwelds Lewisham LtdfiledCriticalSuperwelds Lewisham Ltd
Publication of BE592082ApublicationCriticalpatent/BE592082A/fr