Core for use in casting hollow concrete slab and method of casting such slab
作者： Isao Maebara , Koichiro Fujio
DOI:
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摘要: There is disclosed a core for use in casting long concrete slab forming continuous hole extending alnog its length. The comprises relatively rigid, resilient elongated hollow body having closed opposite ends, and contractible filling member made of an open-cell foamed material filled said body. Also method slab, using the construction as aforesaid.
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