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Priority claimed from GB8028634Aexternal-prioritypatent/GB2082967B/en
Priority claimed from GB8115516Aexternal-prioritypatent/GB2098539B/en
Application filed by Aew Eng Co LtdfiledCriticalAew Eng Co Ltd
Priority claimed from EP19810303842external-prioritypatent/EP0047603B1/en
Application grantedgrantedCritical
Publication of ATE12905T1publicationCriticalpatent/ATE12905T1/en