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Priority to JP16613784UpriorityCriticalpatent/JPH0310856Y2/ja
Priority to GB08526117Aprioritypatent/GB2167631B/en
Priority to US06/791,810prioritypatent/US4705228A/en
Publication of JPS6180665UpublicationCriticalpatent/JPS6180665U/ja
Application grantedgrantedCritical
Publication of JPH0310856Y2publicationCriticalpatent/JPH0310856Y2/ja
