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Priority to JP1981086713UpriorityCriticalpatent/JPS6231852Y2/ja
Priority to GB08217230Aprioritypatent/GB2103795B/en
Priority to US06/388,670prioritypatent/US4470310A/en
Priority to DE19823222714prioritypatent/DE3222714A1/de
Publication of JPS57199819UpublicationCriticalpatent/JPS57199819U/ja
Priority to GB08422792Aprioritypatent/GB2144222B/en
Application grantedgrantedCritical
Publication of JPS6231852Y2publicationCriticalpatent/JPS6231852Y2/ja