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发明名称
Free center
摘要
申请公布号
US2701978(A)
申请公布日期
1955.02.15
申请号
US19510236367
申请日期
1951.07.12
申请人
LEE JOHN W
发明人
LEE JOHN W.
分类号
B23B23/04
主分类号
B23B23/04
代理机构
代理人
主权项
地址
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