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摘要
申请公布号
US2285148(A)
申请公布日期
1942.06.02
申请号
US19400323678
申请日期
1940.03.13
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
CZAJKA JOHN
分类号
B23Q3/00
主分类号
B23Q3/00
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代理人
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