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发明名称
摘要
申请公布号
JPH0271956(U)
申请公布日期
1990.05.31
申请号
JP19880152760U
申请日期
1988.11.22
申请人
发明人
分类号
H01J31/15;(IPC1-7):H01J31/15
主分类号
H01J31/15
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代理人
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