Improvements in or relating to building slabs,申请号GB19470004825-传众专利搜索

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发明名称	Improvements in or relating to building slabs
摘要
申请公布号	GB621340(A)	申请公布日期	1949.04.07
申请号	GB19470004825	申请日期	1947.02.19
申请人	FRANCIS JOHN HIGGINS	发明人
分类号	E04C2/04	主分类号	E04C2/04
代理机构		代理人
主权项
地址

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