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1.发明授权
公开(公告)号：US3476970A
公开(公告)日：1969-11-04
申请号：US3476970D
申请日：1966-09-12
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： GILLIES WALLACE , YAMASAKI GEORGE K , BURGER J C
CPC classification number: H01J17/066 , H01J2893/0066
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