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发明名称
Arched metallic culvert
摘要
申请公布号
US1926843(A)
申请公布日期
1933.09.12
申请号
US19310550540
申请日期
1931.07.13
申请人
FISCHER ALBERT F
发明人
FISCHER ALBERT F.
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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