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公开(公告)号：US2652441A
公开(公告)日：1953-09-15
申请号：US17243450
申请日：1950-07-07
Applicant: ASEA AB
Inventor： GYNT SVEN E , RAGNAR LUNDQVIST
IPC: H05B6/34
CPC classification number: H05B6/34
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