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发明名称
Arc-back indicator
摘要
申请公布号
US2217446(A)
申请公布日期
1940.10.08
申请号
US19380199275
申请日期
1938.03.31
申请人
WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY
发明人
LUDWIG LEON R.
分类号
H01J13/48;H02H7/12
主分类号
H01J13/48
代理机构
代理人
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地址
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