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公开(公告)号：US2932752A
公开(公告)日：1960-04-12
申请号：US60507056
申请日：1956-08-20
Applicant: NAT RES DEV
Inventor： SYDNEY JONES , EDWARD GLADING ROBERT
IPC: H02K26/00
CPC classification number: H02K26/00
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