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经营范围
发明名称
Variable condenser
摘要
申请公布号
US1968108(A)
申请公布日期
1934.07.31
申请号
US19290390951
申请日期
1929.09.07
申请人
DAVID WALD
发明人
WALD DAVID
分类号
H01G5/38
主分类号
H01G5/38
代理机构
代理人
主权项
地址
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