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Application filed by 大阪瓦斯株式会社filedCritical大阪瓦斯株式会社
Priority to JP3150976UpriorityCriticalpatent/JPS592370Y2/ja
Publication of JPS52123720UpublicationCriticalpatent/JPS52123720U/ja
Application grantedgrantedCritical
Publication of JPS592370Y2publicationCriticalpatent/JPS592370Y2/ja
