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Priority to JP8688584UpriorityCriticalpatent/JPS613538U/ja
Priority to US06/741,593prioritypatent/US4647995A/en
Priority to SE8502874Aprioritypatent/SE457674B/sv
Priority to GB08514798Aprioritypatent/GB2161312B/en
Publication of JPS613538UpublicationCriticalpatent/JPS613538U/ja
Application grantedgrantedCritical
Publication of JPH042446Y2publicationCriticalpatent/JPH042446Y2/ja