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Application filedfiledCritical
Priority to JP1974042462UpriorityCriticalpatent/JPS5538850Y2/ja
Priority to DE19742450029prioritypatent/DE2450029C3/de
Priority to US05/517,385prioritypatent/US3988987A/en
Publication of JPS50132460UpublicationCriticalpatent/JPS50132460U/ja
Application grantedgrantedCritical
Publication of JPS5538850Y2publicationCriticalpatent/JPS5538850Y2/ja