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经营范围
发明名称
Mehrsystemroehre
摘要
申请公布号
DE592950(C)
申请公布日期
1934.02.19
申请号
DE1927M099985D
申请日期
1927.06.01
申请人
RADIO-ROEHREN-LABORATORIUM DR. NICKEL G.M.B.H.
发明人
分类号
H01J21/20
主分类号
H01J21/20
代理机构
代理人
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地址
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