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发明名称
Hob
摘要
申请公布号
US2326932(A)
申请公布日期
1943.08.17
申请号
US19390273070
申请日期
1939.05.11
申请人
MICHIGAN TOOL COMPANY
发明人
DRADER JOSEPH C.
分类号
B23F21/16
主分类号
B23F21/16
代理机构
代理人
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