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发明名称
Ditcher
摘要
申请公布号
US1794787(A)
申请公布日期
1931.03.03
申请号
US19290362697
申请日期
1929.05.13
申请人
MCCLURKIN JOHN C
发明人
MCCLURKIN JOHN C.
分类号
E02F5/02
主分类号
E02F5/02
代理机构
代理人
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