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发明名称
Scraper
摘要
申请公布号
US2154503(A)
申请公布日期
1939.04.18
申请号
US19370171255
申请日期
1937.10.27
申请人
THE HEIL CO.
发明人
FRENCH HENRY C.;JR. HERMAN C. FRENTZEL,
分类号
E02F3/64
主分类号
E02F3/64
代理机构
代理人
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地址
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