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发明名称
Scraper
摘要
申请公布号
US2914787(A)
申请公布日期
1959.12.01
申请号
US19580753668
申请日期
1958.08.07
申请人
HARTKOPF DONALD L
发明人
HARTKOPF DONALD L.
分类号
A21B3/00;A47J43/28
主分类号
A21B3/00
代理机构
代理人
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