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公开(公告)号：US2209378A
公开(公告)日：1940-07-30
申请号：US30933439
申请日：1939-12-15
Applicant: GLENN L MARTIN CO
Inventor： BARLOW ERLE P , CRAMER JR HARRY A
IPC: H01H21/18
CPC classification number: H01H21/18
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