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发明名称
High vacuum
摘要
申请公布号
US2874710(A)
申请公布日期
1959.02.24
申请号
US19570651692
申请日期
1957.04.09
申请人
NATIONAL RESEARCH CORPORATION
发明人
BOEHME ROBERT M.
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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