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发明名称
Subsoil tool
摘要
申请公布号
US2684617(A)
申请公布日期
1954.07.27
申请号
US19510247630
申请日期
1951.09.21
申请人
JOHN BLUE COMPANY
发明人
JOHNSTON DOUGLAS
分类号
A01C23/02
主分类号
A01C23/02
代理机构
代理人
主权项
地址
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