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发明名称
Record stacking means
摘要
申请公布号
US2688490(A)
申请公布日期
1954.09.07
申请号
US19500199115
申请日期
1950.12.04
申请人
SCHUMAKER GEORGE K
发明人
SCHUMAKER GEORGE K.
分类号
G11B23/03;G11B33/04
主分类号
G11B23/03
代理机构
代理人
主权项
地址
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