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发明名称
Training device
摘要
申请公布号
US2442297(A)
申请公布日期
1948.05.25
申请号
US19390250958
申请日期
1939.01.14
申请人
LINK JR EDWIN A
发明人
JR. EDWIN A. LINK,
分类号
G09B9/52
主分类号
G09B9/52
代理机构
代理人
主权项
地址
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