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发明名称
Tractor guide
摘要
申请公布号
US1916341(A)
申请公布日期
1933.07.04
申请号
US19310513608
申请日期
1931.02.05
申请人
SPIETH KARL A
发明人
SPIETH KARL A.
分类号
A01B69/04
主分类号
A01B69/04
代理机构
代理人
主权项
地址
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