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公开(公告)号：US3054896A
公开(公告)日：1962-09-18
申请号：US8236161
申请日：1961-01-12
Applicant: JONES WILLIAM H , REECE JUDSON B
Inventor： JONES WILLIAM H , REECE JUDSON B
CPC classification number: H01J37/241 , B23K15/02
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