Buried large cross-section conduit,申请号US19880157157-传众专利搜索

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发明名称	Buried large cross-section conduit
摘要
申请公布号	US4869294(A)	申请公布日期	1989.09.26
申请号	US19880157157	申请日期	1988.02.11
申请人		发明人
分类号	E02D29/045;E03F3/04;E21D11/08;F16L1/028;F16L9/22	主分类号	E02D29/045
代理机构		代理人
主权项
地址

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