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公开(公告)号：US3106351A
公开(公告)日：1963-10-08
申请号：US85071159
申请日：1959-11-03
Applicant: STANDARD COIL PROD CO INC
Inventor： LEONARD FULTON WILLIAM
IPC: H01F41/06
CPC classification number: H01F41/092 , Y10T74/18992
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