Auxiliary calking flange for tunnel lining joints,申请号US19380225041-传众专利搜索

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发明名称	Auxiliary calking flange for tunnel lining joints
摘要
申请公布号	US2160342(A)	申请公布日期	1939.05.30
申请号	US19380225041	申请日期	1938.08.15
申请人	MARSHALL RIBBLE JOHN	发明人	RIBBLE JOHN MARSHALL
分类号	E21D11/38	主分类号	E21D11/38
代理机构		代理人
主权项
地址

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