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Priority claimed from GB2750/75Aexternal-prioritypatent/GB1521531A/en
Application filed by Glacier Metal Co LtdfiledCriticalGlacier Metal Co Ltd
Publication of ATA36976ApublicationCriticalpatent/ATA36976A/en
Application grantedgrantedCritical
Publication of AT349590BpublicationCriticalpatent/AT349590B/en