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发明名称
Attenuator
摘要
申请公布号
US2890369(A)
申请公布日期
1959.06.09
申请号
US19560613459
申请日期
1956.10.02
申请人
SYLVANIA ELECTRIC PRODUCTS INC.
发明人
JR. JOHN H. DRY,
分类号
H01J23/30
主分类号
H01J23/30
代理机构
代理人
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地址
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