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发明名称
Portable key-seating device
摘要
申请公布号
US2602375(A)
申请公布日期
1952.07.08
申请号
US19480002891
申请日期
1948.01.17
申请人
HOLT FRANCIS R
发明人
HOLT FRANCIS R.
分类号
B23C3/30;B23Q9/00
主分类号
B23C3/30
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代理人
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