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发明名称
ELECTRON GUN DEVICE
摘要
申请公布号
JPH01149346(A)
申请公布日期
1989.06.12
申请号
JP19870308258
申请日期
1987.12.04
申请人
JEOL LTD
发明人
WATANABE TAKASHI
分类号
H01J37/06;H01J3/02;H01J29/48;H01J37/063
主分类号
H01J37/06
代理机构
代理人
主权项
地址
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