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发明名称
摘要
申请公布号
JP2772821(B2)
申请公布日期
1998.07.09
申请号
JP19890136557
申请日期
1989.05.30
申请人
发明人
分类号
H01J37/20;G01Q30/02;H01J37/141;(IPC1-7):H01J37/141
主分类号
H01J37/20
代理机构
代理人
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