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发明名称
Variable resistance devices
摘要
申请公布号
GB567017(A)
申请公布日期
1945.01.24
申请号
GB19430011704
申请日期
1943.07.19
申请人
THE PLESSY COMPANY LIMITED
发明人
分类号
H01C10/20
主分类号
H01C10/20
代理机构
代理人
主权项
地址
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