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发明名称
Sewer inlet
摘要
申请公布号
US1810572(A)
申请公布日期
1931.06.16
申请号
US19290400787
申请日期
1929.10.19
申请人
PAFFRATH ERNEST H
发明人
PAFFRATH ERNEST H.
分类号
E03F5/046
主分类号
E03F5/046
代理机构
代理人
主权项
地址
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