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Priority to JP18792380UpriorityCriticalpatent/JPH0229549Y2/ja
Priority to DE19813151742prioritypatent/DE3151742A1/de
Publication of JPS57114546UpublicationCriticalpatent/JPS57114546U/ja
Priority to US06/659,853prioritypatent/US4609164A/en
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Publication of JPH0229549Y2publicationCriticalpatent/JPH0229549Y2/ja