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经营范围
发明名称
Earthworking implement
摘要
申请公布号
US1849451(A)
申请公布日期
1932.03.15
申请号
US19300494991
申请日期
1930.11.11
申请人
E. E. RALSTON
发明人
ERLANGER JACQUES
分类号
A01B1/14
主分类号
A01B1/14
代理机构
代理人
主权项
地址
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