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发明名称
Rubbing attachment for portable rotary power units
摘要
申请公布号
US2722789(A)
申请公布日期
1955.11.08
申请号
US19530336479
申请日期
1953.02.12
申请人
DU-FAST, INC.
发明人
ROBINS SAMUEL DAVIS
分类号
B24B23/04
主分类号
B24B23/04
代理机构
代理人
主权项
地址
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