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摘要
申请公布号
US1821293(A)
申请公布日期
1931.09.01
申请号
US19250046335
申请日期
1925.07.27
申请人
REMINGTON RAND INC.
发明人
DAY WILLIAM H.
分类号
B42F17/18
主分类号
B42F17/18
代理机构
代理人
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