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公开(公告)号：US3544836A
公开(公告)日：1970-12-01
申请号：US3544836D
申请日：1966-04-27
Applicant: FORGFLO CORP
Inventor： REISNER JOHN H
IPC: H01J37/153 , H01J29/56
CPC classification number: H01J37/153
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