Improvements in and relating to beam grids for roof or floor constructions,申请号GB19380017811-传众专利搜索

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发明名称	Improvements in and relating to beam grids for roof or floor constructions
摘要
申请公布号	GB493833(A)	申请公布日期	1938.10.14
申请号	GB19380017811	申请日期	1938.06.15
申请人	ERWIN MAIER	发明人
分类号	E04B5/43;E04B7/10	主分类号	E04B5/43
代理机构		代理人
主权项
地址

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