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经营范围
发明名称
Improvement in adjustable resistances
摘要
申请公布号
GB426690(A)
申请公布日期
1935.04.08
申请号
GB19340019480
申请日期
1934.07.02
申请人
CENTRAL RADIO LABORATORIES
发明人
分类号
H01C10/32
主分类号
H01C10/32
代理机构
代理人
主权项
地址
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