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经营范围
发明名称
MAGNETRON
摘要
申请公布号
GB8927955(D0)
申请公布日期
1990.02.14
申请号
GB19890027955
申请日期
1989.12.11
申请人
HITACHI LTD
发明人
分类号
H01J23/22
主分类号
H01J23/22
代理机构
代理人
主权项
地址
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