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经营范围
发明名称
Elektronenstrahlröhre.
摘要
申请公布号
AT155856(B)
申请公布日期
1939.04.11
申请号
ATD155856
申请日期
1937.04.15
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LTD.
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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