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发明名称
Elektrische Entladungsröhre mit wenigstens teilweiser Metallwandung.
摘要
申请公布号
CH187231(A)
申请公布日期
1936.10.31
申请号
CHD187231
申请日期
1935.08.29
申请人
RADIO CORPORATION OF AMERICA
发明人
AMERICA RADIO CORPORATION OF
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