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SUMIDA SHIYOUTEN KK
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SUMIDA SHIYOUTEN KK
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Application filed by SUMIDA SHIYOUTEN KKfiledCriticalSUMIDA SHIYOUTEN KK
Publication of JPS58123964ApublicationCriticalpatent/JPS58123964A/ja
Publication of JPS6215699B2publicationCriticalpatent/JPS6215699B2/ja
Standardized step module for building prefabricated staircases, process for producing such module, prefabricated staircase and process for assemblying prefabricated staircases