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公开(公告)号：US2520632A
公开(公告)日：1950-08-29
申请号：US58417245
申请日：1945-03-22
Applicant: TORQ ELECTRIC MFG COMPANY
Inventor： JOSEPH GREENHUT
CPC classification number: F01B3/106 , F01B3/0035 , F01B3/0052 , F01B3/0058
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