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经营范围
发明名称
Movable electrode tube
摘要
申请公布号
US2548385(A)
申请公布日期
1951.04.10
申请号
US19460653496
申请日期
1946.03.11
申请人
MARSHALL WILLIAM C
发明人
MARSHALL WILLIAM C.
分类号
H01J21/08
主分类号
H01J21/08
代理机构
代理人
主权项
地址
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