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发明名称
摘要
申请公布号
JPS4894677(U)
申请公布日期
1973.11.12
申请号
JP19720018393U
申请日期
1972.02.16
申请人
发明人
分类号
H01J5/50;H01J61/36;H01K1/28;H01K1/36;H01K1/46;H01K3/16;(IPC1-7):H01K1/46
主分类号
H01J5/50
代理机构
代理人
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地址
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