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发明名称
Vacuum device
摘要
申请公布号
US3330472(A)
申请公布日期
1967.07.11
申请号
US19650492057
申请日期
1965.10.01
申请人
NATIONAL RESEARCH CORPORATION
发明人
MALIAKAL JOSEPH C.
分类号
H01J41/16
主分类号
H01J41/16
代理机构
代理人
主权项
地址
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