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发明名称
Scraper
摘要
申请公布号
US2205508(A)
申请公布日期
1940.06.25
申请号
US19370164518
申请日期
1937.09.18
申请人
WILLIAMS CLAUD H
发明人
WILLIAMS CLAUD H.
分类号
E02F3/65;E02F3/76
主分类号
E02F3/65
代理机构
代理人
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