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Priority to JP1987121680UpriorityCriticalpatent/JPH0611126Y2/ja
Priority to US07/108,162prioritypatent/US4770573A/en
Publication of JPS6427204UpublicationCriticalpatent/JPS6427204U/ja
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Publication of JPH0611126Y2publicationCriticalpatent/JPH0611126Y2/ja