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经营范围
发明名称
Earthworking tool
摘要
申请公布号
US2117461(A)
申请公布日期
1938.05.17
申请号
US19370144250
申请日期
1937.05.22
申请人
HERMAN STEMMAN
发明人
STEMMAN HERMAN
分类号
A01B1/22
主分类号
A01B1/22
代理机构
代理人
主权项
地址
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