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发明名称
Variable resistance device
摘要
申请公布号
US2454986(A)
申请公布日期
1948.11.30
申请号
US19450623644
申请日期
1945.10.22
申请人
NATIONAL TECHNICAL LABORATORIES
发明人
BECKMAN ARNOLD O.
分类号
H01C10/24
主分类号
H01C10/24
代理机构
代理人
主权项
地址
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