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发明名称
High-vacuum pump
摘要
申请公布号
US2585139(A)
申请公布日期
1952.02.12
申请号
US19500189444
申请日期
1950.10.10
申请人
NATIONAL RESEARCH CORPORATION
发明人
LAWRANCE RICHARD B.;JR. JOHN L. MIDDLETON,
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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