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发明名称
Insulation demonstrating device
摘要
申请公布号
US2172229(A)
申请公布日期
1939.09.05
申请号
US19370145780
申请日期
1937.06.01
申请人
AMERICAN FLANGE & MANUFACTURING CO., INC.
发明人
WALDO ROBERT
分类号
G09B23/16
主分类号
G09B23/16
代理机构
代理人
主权项
地址
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