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发明名称
METHOD AND DEVICE FOR AGING ELECTROVACUUM APPARATUS
摘要
申请公布号
GB8918338(D0)
申请公布日期
1989.10.04
申请号
GB19890018338
申请日期
1987.12.28
申请人
LE ELEKTROTEKH INST
发明人
分类号
H01J9/44
主分类号
H01J9/44
代理机构
代理人
主权项
地址
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