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Application filed by 羽田ヒューム管株式会社, 三重重工業株式会社, 株式会社十川ゴム製造所filedCritical羽田ヒューム管株式会社
Priority to JP1990063888UpriorityCriticalpatent/JP2507353Y2/ja
Publication of JPH0422582UpublicationCriticalpatent/JPH0422582U/ja
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Publication of JP2507353Y2publicationCriticalpatent/JP2507353Y2/ja