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发明名称
Hoe
摘要
申请公布号
US2752839(A)
申请公布日期
1956.07.03
申请号
US19520321979
申请日期
1952.11.22
申请人
ROBERTSON THOMAS H
发明人
ROBERTSON THOMAS H.
分类号
A01B1/12
主分类号
A01B1/12
代理机构
代理人
主权项
地址
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