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发明名称
FRICTIONAL HOLDING MEANS
摘要
申请公布号
CA452114(A)
申请公布日期
1948.10.26
申请号
CAD452114
申请日期
申请人
JOHN A. OBERMAIER
发明人
JOHN A. OBERMAIER
分类号
主分类号
代理机构
代理人
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