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公开(公告)号：US2546854A
公开(公告)日：1951-03-27
申请号：US69532246
申请日：1946-09-06
Applicant: VITROSEAL CORP
Inventor： FOSTER ARNOT P , COUNTRYMAN JAMES L
IPC: H01J5/40
CPC classification number: H01J5/40 , H01J2893/0035
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