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公开(公告)号：US3526810A
公开(公告)日：1970-09-01
申请号：US3526810D
申请日：1967-03-07
Applicant: CARY INSTRUMENTS
Inventor： WILLIAMS WILBUR R , DUFRENNE GERALD
CPC classification number: H03F1/52 , H01J49/022 , H02H9/04
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