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发明名称
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摘要
申请公布号
US2214663(A)
申请公布日期
1940.09.10
申请号
US19400327919
申请日期
1940.04.04
申请人
BRADLEY DEWEY EDWARD
发明人
DEWEY EDWARD BRADLEY
分类号
B23Q3/02
主分类号
B23Q3/02
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