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发明名称
Tractor-drawn land float with ditching shoes
摘要
申请公布号
US2888996(A)
申请公布日期
1959.06.02
申请号
US19560568531
申请日期
1956.02.29
申请人
RALSTON DON A
发明人
RALSTON DON A.
分类号
E02F5/02
主分类号
E02F5/02
代理机构
代理人
主权项
地址
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