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发明名称
Attachment for rotary drills or the like
摘要
申请公布号
US2282728(A)
申请公布日期
1942.05.12
申请号
US19400366292
申请日期
1940.11.19
申请人
KERN JOSEPH W
发明人
KERN JOSEPH W.
分类号
B23D57/00
主分类号
B23D57/00
代理机构
代理人
主权项
地址
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