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发明名称
Speed changing mechanism
摘要
申请公布号
US2277432(A)
申请公布日期
1942.03.24
申请号
US19400371346
申请日期
1940.12.23
申请人
THE CINCINNATI ELECTRICAL TOOL COMPANY
发明人
GROENE WILLARD L.
分类号
B24B47/10
主分类号
B24B47/10
代理机构
代理人
主权项
地址
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