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发明名称
ALUMINA PURIFICATION AND ABRASIVE MATERIAL
摘要
申请公布号
CA424251(A)
申请公布日期
1944.12.05
申请号
CAD424251
申请日期
申请人
NORTON COMPANY
发明人
RAYMOND R. RIDGEWAY
分类号
主分类号
代理机构
代理人
主权项
地址
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