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经营范围
发明名称
Screw propelled plow
摘要
申请公布号
US2574353(A)
申请公布日期
1951.11.06
申请号
US19480019610
申请日期
1948.04.07
申请人
SINGER ROBERT H
发明人
SINGER ROBERT H.
分类号
A01B33/04
主分类号
A01B33/04
代理机构
代理人
主权项
地址
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