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发明名称
Cleaning and polishing material
摘要
申请公布号
US2059052(A)
申请公布日期
1936.10.27
申请号
US19340750021
申请日期
1934.10.25
申请人
SPERR JR FREDERICK W
发明人
JR. FREDERICK W. SPERR,
分类号
C11D7/60
主分类号
C11D7/60
代理机构
代理人
主权项
地址
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