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发明名称
摘要
申请公布号
JPS5247869(B2)
申请公布日期
1977.12.06
申请号
JP19720121677
申请日期
1972.12.06
申请人
发明人
分类号
H01J31/15;H01J29/02;H01J29/04
主分类号
H01J31/15
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代理人
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地址
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