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发明名称
Culvert
摘要
申请公布号
US1997236(A)
申请公布日期
1935.04.09
申请号
US19340750374
申请日期
1934.10.27
申请人
SCHROEDER JR ADOLPH
发明人
JR. ADOLPH SCHROEDER,
分类号
E01F5/00
主分类号
E01F5/00
代理机构
代理人
主权项
地址
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