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公开(公告)号：US2666863A
公开(公告)日：1954-01-19
申请号：US21448351
申请日：1951-03-08
Applicant: PROSPERITY CO INC
Inventor： ERNEST DAVIS , MCCALLUM RUSSELL D
IPC: H02P5/747
CPC classification number: H02P5/747
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