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公开(公告)号：US1930116A
公开(公告)日：1933-10-10
申请号：US29810528
申请日：1928-08-07
Applicant: GEN ELECTRIC
Inventor： KURT WIEGAND , KURT BRATEL
IPC: H05B41/232
CPC classification number: H05B41/232 , Y10S315/05
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