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发明名称
Internal screw-thread concentricity indicator
摘要
申请公布号
US2547774(A)
申请公布日期
1951.04.03
申请号
US19480032073
申请日期
1948.06.10
申请人
PRAIS ALFRED R
发明人
PRAIS ALFRED R.
分类号
G01B3/48
主分类号
G01B3/48
代理机构
代理人
主权项
地址
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