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发明名称
High-low speed attachment for drill presses
摘要
申请公布号
US2474500(A)
申请公布日期
1949.06.28
申请号
US19480001023
申请日期
1948.01.07
申请人
KENNETH STEIN FREDERICK
发明人
STEIN FREDERICK KENNETH
分类号
B23B47/16;B23Q5/04
主分类号
B23B47/16
代理机构
代理人
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