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发明名称
Marker
摘要
申请公布号
US2176363(A)
申请公布日期
1939.10.17
申请号
US19370178744
申请日期
1937.12.08
申请人
DEERE & COMPANY
发明人
SILVER WALTER H.
分类号
A01B69/02
主分类号
A01B69/02
代理机构
代理人
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