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发明名称
Core bit
摘要
申请公布号
US3331455(A)
申请公布日期
1967.07.18
申请号
US19640340891
申请日期
1964.01.29
申请人
PRATT & WHITNEY INC.
发明人
JR. CHESTER A. ANDERSON,;COTE LEO P.
分类号
B23B51/04
主分类号
B23B51/04
代理机构
代理人
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地址
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