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公开(公告)号：US2563055A
公开(公告)日：1951-08-07
申请号：US79413047
申请日：1947-12-26
Applicant: SHELL DEV
Inventor： METTIVIER MEYER RUDOLF HERMAN , JACOB DIJKSTRA
CPC classification number: H02K15/024 , C08F6/22
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