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发明名称
Culvert structure
摘要
申请公布号
US2010293(A)
申请公布日期
1935.08.06
申请号
US19330689913
申请日期
1933.09.18
申请人
CARSWELL FIRMAN L;SCHMIDT OTTO W
发明人
CARSWELL FIRMAN L.;SCHMIDT OTTO W.
分类号
E01F5/00
主分类号
E01F5/00
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代理人
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