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发明名称
Scraper
摘要
申请公布号
US3079998(A)
申请公布日期
1963.03.05
申请号
US19580740867
申请日期
1958.06.09
申请人
REUTER FRANZ G;ULRICH NEHSE
发明人
REUTER FRANZ G.;NEHSE ULRICH
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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