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经营范围
发明名称
Natural Bottom Culvert and Method for Installation
摘要
申请公布号
CA2100186(A1)
申请公布日期
1994.01.15
申请号
CA19932100186
申请日期
1993.07.09
申请人
DAY, JESSE C.
发明人
DAY, JESSE C.
分类号
E01F5/00;(IPC1-7):E01F5/00;E03F3/00;E03F3/06
主分类号
E01F5/00
代理机构
代理人
主权项
地址
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