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Priority to JP7509482UpriorityCriticalpatent/JPS58179814U/ja
Publication of JPS58179814UpublicationCriticalpatent/JPS58179814U/ja
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Publication of JPH0514667Y2publicationCriticalpatent/JPH0514667Y2/ja
A system consisting of a fire safe sealing and an aperture in a floor or a ceiling of a building and a method for sealing an aperture in a floor or a ceiling of a building