Pouring bridge for concrete work,申请号US19570670690-传众专利搜索

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发明名称	Pouring bridge for concrete work
摘要
申请公布号	US2969720(A)	申请公布日期	1961.01.31
申请号	US19570670690	申请日期	1957.07.09
申请人	BURNAHM TROY T	发明人	BURNAHM TROY T.
分类号	E01C19/18;E01D21/00	主分类号	E01C19/18
代理机构		代理人
主权项
地址

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