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经营范围
发明名称
摘要
申请公布号
JPS6448861(U)
申请公布日期
1989.03.27
申请号
JP19870142960U
申请日期
1987.09.21
申请人
发明人
分类号
H01J37/244;(IPC1-7):H01J37/244
主分类号
H01J37/244
代理机构
代理人
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地址
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