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经营范围
发明名称
Electron beam welding apparatus
摘要
申请公布号
US3408474(A)
申请公布日期
1968.10.29
申请号
US19660539757
申请日期
1966.04.04
申请人
GENERAL ELECTRIC COMPANY
发明人
DOWNING ROBERT D.
分类号
H01J37/21
主分类号
H01J37/21
代理机构
代理人
主权项
地址
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