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发明名称
SUSPENSION AND SHIELDING OF RADIO VALVES
摘要
申请公布号
CA309505(A)
申请公布日期
1931.03.17
申请号
CAD309505
申请日期
申请人
FERRANTI
发明人
ALBERT HALL
分类号
主分类号
代理机构
代理人
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