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发明名称
Automatic drag scraper
摘要
申请公布号
US2152888(A)
申请公布日期
1939.04.04
申请号
US19380186094
申请日期
1938.01.21
申请人
HUNGATE JAMES B;STRASSWEG HERBERT A
发明人
HUNGATE JAMES B.;STRASSWEG HERBERT A.
分类号
E02F3/64
主分类号
E02F3/64
代理机构
代理人
主权项
地址
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