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发明名称
Mechanical page turner
摘要
申请公布号
US2494453(A)
申请公布日期
1950.01.10
申请号
US19460705322
申请日期
1946.10.24
申请人
AERONAUTICAL RESEARCH CORPORATION
发明人
RECK FRANK
分类号
B42D9/06
主分类号
B42D9/06
代理机构
代理人
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