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公开(公告)号：US2730380A
公开(公告)日：1956-01-10
申请号：US28460252
申请日：1952-04-26
Applicant: GLENN L MARTIN CO
Inventor： ESPY MELVIN P , PITMAN WILLIAM W , BURNHAM JOSSELYN
IPC: F16L29/04
CPC classification number: F16L29/04 , Y10T137/87957
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