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公开(公告)号：US3072967A
公开(公告)日：1963-01-15
申请号：US83010359
申请日：1959-07-28
Applicant: CONTROLS CO OF AMERICA
Inventor： MATHEWS WILLIAM K , PERKINS JR CARL C
IPC: H01F41/12
CPC classification number: H01F41/12 , Y10S425/044
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