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公开(公告)号：US2196434A
公开(公告)日：1940-04-09
申请号：US18136037
申请日：1937-12-23
Applicant: KARL-GUSTAV ALLSTROM
Inventor： KARL-GUSTAV ALLSTROM
IPC: H02K7/102
CPC classification number: H02K7/102 , Y10T477/38
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