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经营范围
发明名称
Abrasive ceramic granules
摘要
申请公布号
US2259601(A)
申请公布日期
1941.10.21
申请号
US19390250067
申请日期
1939.01.09
申请人
ASPER DENNIS C
发明人
ASPER DENNIS C.
分类号
C04B33/02
主分类号
C04B33/02
代理机构
代理人
主权项
地址
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