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经营范围
发明名称
Combined scraper and grader
摘要
申请公布号
US2104675(A)
申请公布日期
1938.01.04
申请号
US19360075803
申请日期
1936.04.22
申请人
GEORGE RUFF
发明人
RUFF GEORGE
分类号
E02F3/76
主分类号
E02F3/76
代理机构
代理人
主权项
地址
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