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发明名称
Butt for backfill tampers
摘要
申请公布号
US1893596(A)
申请公布日期
1933.01.10
申请号
US19310566825
申请日期
1931.10.03
申请人
WORTHINGTON PUMP AND MACHINERY CORPORATION
发明人
PERKINS WALTER F.
分类号
E02D3/046
主分类号
E02D3/046
代理机构
代理人
主权项
地址
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