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发明名称
Tractor guiding device
摘要
申请公布号
US1891704(A)
申请公布日期
1932.12.20
申请号
US19310549232
申请日期
1931.07.07
申请人
HENRY BLUME
发明人
BLUME HENRY
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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