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Priority to JP1983109961UpriorityCriticalpatent/JPS6019220U/ja
Priority to GB08415585Aprioritypatent/GB2143694B/en
Priority to DE3425950Aprioritypatent/DE3425950C2/de
Publication of JPS6019220UpublicationCriticalpatent/JPS6019220U/ja
Application grantedgrantedCritical
Publication of JPH051132Y2publicationCriticalpatent/JPH051132Y2/ja