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Priority to JP1981009146UpriorityCriticalpatent/JPH0223052Y2/ja
Publication of JPS57125136UpublicationCriticalpatent/JPS57125136U/ja
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Publication of JPH0223052Y2publicationCriticalpatent/JPH0223052Y2/ja
A system for providing a fire safe sealing in an aperture in a wall, a ceiling or a floor of a building, an element for a fire safe sealing system and a bulkhead for a fire safe sealing in the aperture
A system for providing a fire safe sealing in an aperture in a wall, a ceiling or a floor of a building, an element for a fire safe sealing system and a bulkhead for a fire safe sealing in the aperture