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发明名称
High-vacuum device
摘要
申请公布号
US2630266(A)
申请公布日期
1953.03.03
申请号
US19510220831
申请日期
1951.04.13
申请人
NATIONAL RESEARCH CORPORATION
发明人
LAWRANCE RICHARD B.
分类号
F04F9/00
主分类号
F04F9/00
代理机构
代理人
主权项
地址
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