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经营范围
发明名称
Cathodes réfractaires à longue vie
摘要
申请公布号
FR1518363(A)
申请公布日期
1968.03.22
申请号
FR19670608446
申请日期
1967.04.04
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
分类号
H01J1/20;H01J27/26;H01J37/075
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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