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发明名称
Primary electrical training test board apparatus
摘要
申请公布号
US2477653(A)
申请公布日期
1949.08.02
申请号
US19430498118
申请日期
1943.08.10
申请人
THE W. H. REISNER MANUFACTURING COMPANY
发明人
ROANE ARDEN E.
分类号
G09B23/18
主分类号
G09B23/18
代理机构
代理人
主权项
地址
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