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发明名称
Bit for drilling an undercut hole
摘要
申请公布号
US4998981(A)
申请公布日期
1991.03.12
申请号
US19900513563
申请日期
1990.04.24
申请人
KABUSHIKI KAISHA MIYANAGA
发明人
MIYANAGA, MASAAKI
分类号
B23B51/00;B28D1/14
主分类号
B23B51/00
代理机构
代理人
主权项
地址
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