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Priority to JP1974060381UpriorityCriticalpatent/JPS5850346Y2/ja
Priority to US05/581,237prioritypatent/US3977761A/en
Publication of JPS50150329UpublicationCriticalpatent/JPS50150329U/ja
Application grantedgrantedCritical
Publication of JPS5850346Y2publicationCriticalpatent/JPS5850346Y2/ja