Improvements in or relating to the manufacture of hollow concrete beams,申请号GB19430013672-传众专利搜索

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发明名称	Improvements in or relating to the manufacture of hollow concrete beams
摘要
申请公布号	GB568820(A)	申请公布日期	1945.04.23
申请号	GB19430013672	申请日期	1943.08.21
申请人	HARRY MASON	发明人
分类号	B28B7/30	主分类号	B28B7/30
代理机构		代理人
主权项
地址

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