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Priority to JP19776884UpriorityCriticalpatent/JPH0422934Y2/ja
Priority to US06/726,240prioritypatent/US4582144A/en
Priority to DE19853515244prioritypatent/DE3515244A1/de
Publication of JPS61109687UpublicationCriticalpatent/JPS61109687U/ja
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Publication of JPH0422934Y2publicationCriticalpatent/JPH0422934Y2/ja