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经营范围
发明名称
VACUUM DEVICES
摘要
申请公布号
GB8621600(D0)
申请公布日期
1987.03.18
申请号
GB19860021600
申请日期
1986.09.08
申请人
GENERAL ELECTRIC CO PLC
发明人
分类号
H01J21/10
主分类号
H01J21/10
代理机构
代理人
主权项
地址
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