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发明名称
Boring chuck
摘要
申请公布号
US2177820(A)
申请公布日期
1939.10.31
申请号
US19370149863
申请日期
1937.06.23
申请人
BROWN HARRY F
发明人
BROWN HARRY F.
分类号
B23B31/02
主分类号
B23B31/02
代理机构
代理人
主权项
地址
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