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经营范围
发明名称
Arrangement for dispensing badly conductive substances in vacuum valves
摘要
申请公布号
US1875744(A)
申请公布日期
1932.09.06
申请号
US19290365340
申请日期
1929.05.23
申请人
BERNHARD LOEWE
发明人
LOEWE BERNHARD
分类号
H01J7/18;H01J9/04;H01J9/39
主分类号
H01J7/18
代理机构
代理人
主权项
地址
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