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发明名称
ABRASIVE STONE
摘要
申请公布号
CA296649(A)
申请公布日期
1930.01.14
申请号
CAD296649
申请日期
申请人
THE CARBORUNDUM COMPANY
发明人
GEORGE REED RAYNER
分类号
主分类号
代理机构
代理人
主权项
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