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经营范围
发明名称
SEGMENTAL FILLING FOR REFINER PLUGS
摘要
申请公布号
CA639370(A)
申请公布日期
1962.04.03
申请号
CAD639370
申请日期
申请人
JOHN W. BOLTON AND SONS
发明人
CHARLES A. JOHNSON
分类号
主分类号
代理机构
代理人
主权项
地址
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