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发明名称
Scraper
摘要
申请公布号
US2454475(A)
申请公布日期
1948.11.23
申请号
US19430502483
申请日期
1943.09.15
申请人
OWEN BENJAMIN F
发明人
OWEN BENJAMIN F.
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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