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发明名称
Earth working method
摘要
申请公布号
US2842899(A)
申请公布日期
1958.07.15
申请号
US19560563710
申请日期
1956.02.06
申请人
PADRICK JOHN R
发明人
PADRICK JOHN R.
分类号
A01B49/04
主分类号
A01B49/04
代理机构
代理人
主权项
地址
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