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发明名称
BOTTOM RING ASSEMBLY
摘要
申请公布号
CA636583(A)
申请公布日期
1962.02.13
申请号
CAD636583
申请日期
申请人
OGLEBAY NORTON COMPANY
发明人
JOEL C. CARPENTER;WALTER W. URMETZ
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主分类号
代理机构
代理人
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